Question

ВАРИАНТ 2, ПОМОГИТЕ ПОЖАЛУЙСТА С ЗАДАНИЕМ ДАЮ 50 БАЛЛОВ​

Answer 1

Ответ:

$1) \frac{3m}{8b} \times \frac{20}{3 {m}^{2} } = \frac{60m}{24b {m}^{2} } = \frac{5}{2bm}$

$2) - \frac{2 {x}^{2} }{3y} \times \frac{9 {y}^{2} }{8} = - \frac{18 {x {}^{2} {y}^{2} } }{24y} = - \frac{3 {x}^{2} y}{4}$

$3)8b \times \frac{y}{4 {b}^{2} } = \frac{8by}{4 {b}^{2} } = \frac{2y}{b}$

$\frac{a - 2m}{12c} \times \frac{18 {c}^{2} }{2m - a} = \frac{18 {c}^{2} (a - 2m)}{12c(2m - a)} = \frac{3c(a - 2m)}{2( - (a - 2m))} = \frac{3c}{2 \times ( - 1)} = - \frac{3c}{2}$

$\frac{ {x}^{2} - 16 }{8 {x}^{3} } \times \frac{4x}{ x + 4} = \frac{(x - 4)(x + 4) \times 4x}{8 {x}^{3}(x + 4) } = \frac{4x(x - 4)}{8 {x}^{3} } = \frac{x - 4}{2 {x}^{2} }$