Question

РЕШИТЕ ПО ТЕОРЕМЕ ВИЕТА И ДИСКРИМИНАНТ ТОЛЬКО 4 ,5, 6

Answer 1

Ответ:

$4) \\ - 88x {}^{2} = 0 \\ 88 {x}^{2} = 0 \\ {x}^{2} = 0 \\ x = 0 \\ 5) \\ x {}^{2} + 2x - 3 = 0 \\ {x}^{2} + 3x - x - 3 = 0 \\ x(x + 3) - (x + 3) = 0 \\ (x + 3)(x - 1) = 0 \\ x + 3 = 0 \\ x - 1 = 0 \\ x1 = - 3 \\ x2 = 1$

$- {x}^{2} + 5x + 11 = 0 \\ a = - 1 \: \: d = 5 \: c = 11 \\ {5}^{2} - 4x( - 1) \times 11 \\ = 69$