Question

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Answer 1

1.

$\frac{x+5}{2y-6}:\frac{x^{2} -25}{3-y} = \frac{x+5}{2(y-3)}*\frac{3-y}{x^{2} -25} = \frac{x+5}{2(y-3)}*\frac{-(y-3)}{(x-5)(x+5)} =-\frac{1}{2(x-5)} = \frac{1}{10-2x}$

Вiдповiдь:    $\frac{1}{10-2x}$

2.

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

Вiдповiдь:    $8ab^2$