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- <?php
- /*Вычисление дискриминанта*/
- function discriminant($a, $b, $c)
- {
- return $b*$b - (4*$a*$c);
- }
- assert( -151 == discriminant(10, 3, 4) );
- assert( 169 == discriminant(-10, 3, 4) );
- /*Вычисляем первый корень*/
- function square_1($a, $b, $c)
- {
- return (-$a + sqrt($b)) / (2 * $c);
- }
- /*Вычисляем второй корень*/
- function square_2($a, $b, $c)
- {
- return (-$a - sqrt($b)) / (2 * $c);
- }
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