Question

Помогите решить 2 и 3 пример запишите решение на лестке

Answer 1

$2) (\frac{8x}{x-2} + 2x):\frac{4x + 8}{7x-14} = \frac{2x^2+4x}{x-2}*\frac{7(x-2)}{4(x+2)} = \frac{14x}{4} = \frac{7x}2\\3) \frac{5a}{a+3} + \frac{a-6}{3a+9}*\frac{135}{6a-a^2} = \frac{5a}{a+3} - \frac{135*(a-6)}{3(a+3)*a(a-6)} = \frac{5a^2 - 45}{a(a+3)} = \frac{5(a-3)(a+3)}{a(a+3)} = \frac{5(a-3)}{a}$