Question

Решите пожалуйста, 90 баллов

Answer 1

1.

А)

$\frac{ab + ac}{ {b}^{2} + 2bc + {c}^{2} } = \frac{a(b + c)}{ {(b + c)}^{2} } = \frac{a}{b + c}$

Б)

$\frac{8xyz}{4xy - 6yz} = \frac{8xyz}{2y(2x - 3z)} = \frac{4xz}{2x - 3z}$

2.

$- 64a {b}^{3} {c}^{2} d + 8a {b}^{3} {c}^{2} - 24 {a}^{2} {b}^{4} c {d}^{2} = - 8a {b}^{3} c( 8cd - c + 3ab {d}^{2} )$

3.

А)

$6x - z(x - y) - 6y = 6(x - y) - z(x - y) = (6 - z)(x - y)$

Б)

$4ab + 4by - ac - yc = 4b(a + y) - c(a + y) = (4b - c)(a + y)$