Question

Пожалуйста Срочно!!!!​

Answer 1

Объяснение:

1.

1)

${x}^{2} - 4x - 32 = {x}^{2} + 4x - 8x - 32 = x(x + 4) - 8(x + 4) = (x + 4)(x - 8)$

2)

$4 {x}^{2} - 15x + 9 = 4 {x}^{2} - 3x - 12x + 9 = x(4x - 3) - 3(4x - 3) = (4x - 3)(x - 3)$

2.

1)

${x}^{4} - 35 {x}^{2} - 36 = 0 \\ {x}^{2} = t \\ {t}^{2} - 35t - 36 = 0 \\ d = 1225 + 4 \times 36 = 1369 \\ t1.2 = \frac{35 + - \sqrt{1369} }{2} = \\ t1 = 36 \\ t2 = - 1$

2)

$\frac{ {x}^{2} - 7x}{x + 2} = \frac{18}{x + 2} = {x}^{2} - 7x = 18 \\ {x}^{2} - 7x - 18 = 0 \\ d = 49 + 4 \times 18 = 121 \\ x1.2 = \frac{7 + - 11}{2} = \\ x1 = 9 \\ x2 = - 2$