Question

Помогите пожалуйста очень надо!)

Answer 1

$a) \: \frac{x(x - 2)}{y} \times \frac{ {y}^{2} }{x} = y(x - 2) = yx - 2y \\ b) \: \frac{(a - b)}{ab} \times \frac{3ab}{b(a - b)} = \frac{3}{b} \\ c) \: 3(x - 5y) \times \frac{4}{(x - 5y)(x + 5y)} = \frac{12}{x + 5y} \\ d) \: \frac{a}{(a - 2)(a + 2)} \times {(a - 2)}^{2} = \frac{a}{(a -2)(a + 2) } \times (a - 2)(a - 2) = \frac{ {a}^{2} - 2a }{a + 2} \\ e) \: \frac{(c - 4)(c + 4)}{15bc} \times \frac{5b}{c + 4} = \frac{c - 4}{c} \\ f) \: \frac{(x + 3)(x + 3)}{2(x - 2)} \times \frac{(x - 2)(x + 2)}{3(x + 3)} = \frac{(x + 3)(x + 2)}{3} = \frac{ {x}^{2} + 5x + 6 }{3}$