diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
new file mode 100644
index 0000000..272ae14
--- /dev/null
+++ b/.github/workflows/php.yml
@@ -0,0 +1,17 @@
+name: Github Actions for PHP with PHPUnit Tests
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Install dependencies
+        run: composer --dev install
+
+      - name: Run test suite
+        run: composer run-script test
\ No newline at end of file
diff --git a/README.MD b/README.MD
index 060c407..4b12d0d 100644
--- a/README.MD
+++ b/README.MD
@@ -1,2 +1,4 @@
 - Чтобы развернуть проект локально, можно использовать ``docker-compose up`` внутри директории docker
-- Чтобы запустить автотесты, необходимо выполнить команду ``./vendor/bin/phpunit tests``
\ No newline at end of file
+- Чтобы запустить автотесты, необходимо выполнить команду ``./vendor/bin/phpunit tests``
+- Чтобы выполнить консольную команду решения уравнения, необходимо выполнить ``php console.php app:solve-equation``
+- Пример команды c параметрами: ``php console.php app:solve-equation '-5.765' 1 '-3.23``
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 977d51e..7620776 100644
--- a/composer.json
+++ b/composer.json
@@ -13,5 +13,11 @@
     "require-dev": {
         "phpunit/phpunit": "^9.5",
         "mockery/mockery": "^1.5"
+    },
+    "require": {
+        "symfony/console": "^6.2"
+    },
+    "scripts": {
+        "test": "./vendor/bin/phpunit tests"
     }
 }
diff --git a/composer.lock b/composer.lock
index b80ae2d..1f59108 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,726 @@
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+            ],
+            "time": "2022-05-30T19:18:58+00:00"
+        },
+        {
+            "name": "symfony/string",
+            "version": "v6.2.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/string.git",
+                "reference": "145702685e0d12f81d755c71127bfff7582fdd36"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/string/zipball/145702685e0d12f81d755c71127bfff7582fdd36",
+                "reference": "145702685e0d12f81d755c71127bfff7582fdd36",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "symfony/polyfill-ctype": "~1.8",
+                "symfony/polyfill-intl-grapheme": "~1.0",
+                "symfony/polyfill-intl-normalizer": "~1.0",
+                "symfony/polyfill-mbstring": "~1.0"
+            },
+            "conflict": {
+                "symfony/translation-contracts": "<2.0"
+            },
+            "require-dev": {
+                "symfony/error-handler": "^5.4|^6.0",
+                "symfony/http-client": "^5.4|^6.0",
+                "symfony/intl": "^6.2",
+                "symfony/translation-contracts": "^2.0|^3.0",
+                "symfony/var-exporter": "^5.4|^6.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "Resources/functions.php"
+                ],
+                "psr-4": {
+                    "Symfony\\Component\\String\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "grapheme",
+                "i18n",
+                "string",
+                "unicode",
+                "utf-8",
+                "utf8"
+            ],
+            "support": {
+                "source": "https://github.com/symfony/string/tree/v6.2.0"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-11-30T17:13:47+00:00"
+        }
+    ],
     "packages-dev": [
         {
             "name": "doctrine/instantiator",
diff --git a/console.php b/console.php
new file mode 100644
index 0000000..d9c8c5d
--- /dev/null
+++ b/console.php
@@ -0,0 +1,12 @@
+<?php
+
+require_once __DIR__ . '/vendor/autoload.php';
+
+use App\Infrastructure\Console\Commands\SolveEquationCommand;
+use Symfony\Component\Console\Application;
+
+$application = new Application();
+
+$application->add(new SolveEquationCommand());
+
+$application->run();
diff --git a/src/AppBundle/Domains/EquationManager.php b/src/AppBundle/Domains/EquationManager.php
new file mode 100644
index 0000000..29449db
--- /dev/null
+++ b/src/AppBundle/Domains/EquationManager.php
@@ -0,0 +1,63 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\AppBundle\Domains;
+
+use App\AppBundle\Domains\Exceptions\EqualsZeroException;
+
+class EquationManager
+{
+    /**
+     * Решает квадратное уравнение
+     *
+     * @param float|null $a
+     * @param float|null $b
+     * @param float|null $c
+     *
+     * @return array
+     * @throws EqualsZeroException
+     */
+    public static function solve(?float $a, ?float $b = 0, ?float $c = 0): array
+    {
+        if (self::CheckLessThanZero($a)) {
+            throw new EqualsZeroException('Значение \'a\' не может быть равен нулю');
+        }
+
+        $discriminant = $b * $b - 4 * $a * $c;
+        if (self::CheckMoreThanZero($discriminant)) {
+            $x1 = (-$b + sqrt($discriminant)) / (2 * $a);
+            $x2 = (-$b - sqrt($discriminant)) / (2 * $a);
+        } elseif (self::CheckLessThanZero($discriminant)) {
+            $x1 = $x2 = (-$b) / 2 * $a;
+        } else {
+            return [];
+        }
+
+        return [(float)$x1, (float)$x2];
+    }
+
+    /**
+     * Сравнивает числа с плавающей точкой с нулём
+     *
+     * @param float $num
+     *
+     * @return bool
+     */
+    private static function CheckLessThanZero(float $num): bool
+    {
+        return abs($num) < PHP_FLOAT_EPSILON;
+    }
+
+    /**
+     * Проверяет что число с плавающей точкой больше нуля
+     *
+     * @param float $num
+     *
+     * @return bool
+     */
+    private static function CheckMoreThanZero(float $num): bool
+    {
+        return $num > PHP_FLOAT_EPSILON;
+    }
+}
diff --git a/src/AppBundle/Domains/Exceptions/EqualsZeroException.php b/src/AppBundle/Domains/Exceptions/EqualsZeroException.php
new file mode 100644
index 0000000..c9eaafe
--- /dev/null
+++ b/src/AppBundle/Domains/Exceptions/EqualsZeroException.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace App\AppBundle\Domains\Exceptions;
+
+class EqualsZeroException extends \Exception
+{
+
+}
\ No newline at end of file
diff --git a/src/Infrastructure/Console/Commands/SolveEquationCommand.php b/src/Infrastructure/Console/Commands/SolveEquationCommand.php
new file mode 100644
index 0000000..5d1c52b
--- /dev/null
+++ b/src/Infrastructure/Console/Commands/SolveEquationCommand.php
@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Console\Commands;
+
+use App\AppBundle\Domains\EquationManager;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Input\{InputArgument, InputInterface};
+
+#[AsCommand(
+    name: 'app:solve-equation',
+)]
+class SolveEquationCommand extends Command
+{
+    protected static $defaultDescription = 'Решает квадратное уравнение';
+
+    protected function configure(): void
+    {
+        $this
+            ->addArgument('a', InputArgument::OPTIONAL, 'Значение а')
+            ->addArgument('b', InputArgument::OPTIONAL, 'Значение b')
+            ->addArgument('c', InputArgument::OPTIONAL, 'Значение c');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $a = $input->getArgument('a');
+        $b = $input->getArgument('b');
+        $c = $input->getArgument('c');
+
+        $output->writeln([
+            'Решение квадратного уравнения',
+            '============',
+            '',
+        ]);
+
+        $a = $this->inputFormatter($a);
+        $b = $this->inputFormatter($b);
+        $c = $this->inputFormatter($c);
+
+        $equation = new EquationManager();
+        try {
+            $value = $equation::solve($a, $b, $c);
+        } catch (\Exception $e) {
+            $output->write($e->getMessage());
+            return Command::FAILURE;
+        }
+
+        if ($value === []) {
+            $output->write('Корней нет');
+            return Command::SUCCESS;
+        }
+        [$x1, $x2] = $value;
+
+        $output->writeln([
+            'Корни квадратного уравнения:',
+            'x1=' . $x1,
+            'x2=' . $x2,
+        ]);
+
+        return Command::SUCCESS;
+    }
+
+    /**
+     * Форматирует входные данные
+     * @FIXME найти способ лучше (проблема в том, что символ "-" консоль воспринимает как название параметра,
+     * поэтому отрицательные числа приходится передавать в ''
+     *
+     * @param string|null $value
+     * @return float|null
+     */
+    private function inputFormatter(string|null $value): ?float
+    {
+        if ($value === null) {
+            return null;
+        }
+        $value = str_replace("'", "", $value);
+        return (float)$value;
+    }
+}
diff --git a/tests/Unit/SolveTest.php b/tests/Unit/SolveTest.php
index ca740a2..b203cee 100644
--- a/tests/Unit/SolveTest.php
+++ b/tests/Unit/SolveTest.php
@@ -2,12 +2,75 @@
 
 namespace Tests\Unit;
 
+use App\AppBundle\Domains\EquationManager;
+use App\AppBundle\Domains\Exceptions\EqualsZeroException;
 use PHPUnit\Framework\TestCase;
 
 class SolveTest extends TestCase
 {
+    private EquationManager $equation;
+
+    public function __construct(?string $name = null, array $data = [], $dataName = '')
+    {
+        $this->equation = new EquationManager();
+        parent::__construct($name, $data, $dataName);
+    }
+
     public function testHaveNotRoots()
     {
-        $this->assertSame(true, true);
+        // x^2+1 = 0
+        $value = $this->equation::solve(1, 0, 1);
+        $this->assertSame([], $value);
+    }
+
+    public function testHaveTwoRoots()
+    {
+        // x^2-1 = 0
+        $value = $this->equation::solve(1, 0, -1);
+        $this->assertEquals([1, -1], $value);
+    }
+
+    public function testHaveOneRoot()
+    {
+        // x^2+2x+1
+        $value = $this->equation::solve(0.05, 0.7, -1.8);
+        $this->assertEquals([2.219544457292888, -16.219544457292887], $value);
+    }
+
+    public function testIsNull()
+    {
+        $this->expectException(EqualsZeroException::class);
+        // a=0
+        $this->equation::solve(0);
+    }
+
+    /**
+     * @dataProvider otherTypesProvider
+     */
+    public function testWithOtherTypes($arguments, $result)
+    {
+        $value = $this->equation::solve($arguments['a'], $arguments['b'], $arguments['c']);
+        $this->assertEquals($result, $value);
+    }
+
+    private function otherTypesProvider()
+    {
+        return [
+            ['arguments' => [
+                'a' => '1',
+                'b' => '0',
+                'c' => '1'
+            ], 'result' => []],
+            ['arguments' => [
+                'a'=>'1',
+                'b' => '0',
+                'c' => '-1'
+            ], 'result' => [1, -1]],
+            ['arguments' => [
+                'a' => '0.05',
+                'b' => '0.7',
+                'c' => '-1.8'
+            ], 'result' => [2.219544457292888, -16.219544457292887]],
+        ];
     }
 }
\ No newline at end of file