Question

обязательно расписать срочно​

Answer 1

$\frac{m - 2}{ (m + 7)(m - 7) } \times \frac{m + 7}{m - 2} = \frac{1}{m - 7}$

$\frac{b(a - b)}{8} \times \frac{4a}{ {b}^{4} } = \frac{ {a}^{2} - ab }{2 {b}^{3} }$

$\frac{x - y}{xy} \times \frac{3xy}{(x + y)(x - y)} = \frac{3}{x + y}$

$\frac{(a + 4)(a - 4)}{a - 3} \times \frac{a - 3}{a + 4} = a - 4$

Answer 2

Ответ:

1. a)1/m-7 b)a²-ab/2b³

2. a)3/x+y b) a-4

Объяснение:

a) m-2/m²-49 * m+7/m-2 = m-2/(m-7)(m+7) * m+7/m-2

= 1/m-7

b) ab-b²/8 * 4a/b⁴ = b(a-b)/2 * a/b⁴ = a-b/2 * a/b³

= a(a-b)/2b³ = a²-ab/2b³

a) x-y/xy : x²-y²/3xy = x-y/xy * 3xy/(x-y)(x+y) = 3/x+y

b) a²-16/a-3 : a+4/a-3 = (a-4)(a+4)/a-3 * a-3/a+4 = a-4