Question

Скажите пожалуйста
-3x²+5x-2?

Answer 1

Ответ:

$- 3 {x}^{2} + 5x - 2 \\ - 3 {x}^{2} + 3x + 2x - 2 \\ - 3x \times (x - 1) + 2 \times ( x - 1) \\ - (x - 1) \times (3x - 2)$

Answer 2

$- 3x {}^{2} + 5x - 2 = 0 \\ 3x {}^{2} - 5x + 2 = 0 \\ d = - 5 {}^{2} - 4 \times 3 \times 2 = 1 \\ x1 = \frac{5 - \sqrt{1} }{2 \times 3} = \frac{4}{6} = \frac{2}{3} \\ x2 = \frac{5 + \sqrt{1} }{2 \times 3} = \frac{6}{6} = 1$

d- дискриминант