Question

помогите~ 55 баллов~

Answer 1

1.

а)

$- 7b {}^{2} \times (3b + 2)$

б)

$m \times (n + 3) - n \times (n + 3)$

$(n + 3) \times (m - n)$

в)

$9 {}^{2}a {}^{2} - b {}^{2}$

$(9a {}^{2} ) - b {}^{2}$

$(9a - b) \times (9a + b)$

Г)

$- 33y {}^{3} + 108y$

$- 3y \times (11y {}^{2} - 36)$

2.

а)

$\frac{4ab \times (3a + 2b)}{(3a - 2b) \times (3a + 2b)}$

$\frac{4ab}{3a - 2b}$

б)

$\frac{5 - 6c}{5 + 6c}$

3.

$x {}^{2} + 4x + 4 - 49 = 0$

$x {}^{2} + 9x {}^{} - 5x - 45 = 0$

$x \times (x + 9) - 5(x + 9) = 0$

$(x + 9) \times (x - 5) = 0$

$x + 9 = 0 \\ x - 5 = 0$

$x1 = - 9 \\ x2 = 5$

4.

$x {}^{2} + 14x + ( - 51x - 867) \times (x - 3)$

$x {}^{2} + 14x - 51x {}^{2} + 153x - 867x + 2601$

$- 50x {}^{2} - 700x + 2601$

5.

$\frac{183 {}^{3 } + 62 {}^{3} }{244} - (162 \times 62)$

$\frac{183 {}^{3} + 62 {}^{3} }{244} - 10444$