Question

помогите, срочно!!
$\frac{x {}^{2} - 9 }{x {}^{2} - 5x} \times \frac{x - 5}{x + 3}$

$\frac{m + 2n}{2 - 3m} \div \frac{m { } +^{2} + 4mn + 4n {}^{2} }{3m {}^{2} - 2m }$

Answer 1

$\frac{x^2-9}{x^2-5x} \times \frac{x-5}{x+3} = \frac{(x-3)(x+3)}{x(x-5)} \times \frac{x-5}{x+3} = \frac{x-3}{x} \\ \frac{m+2n}{2-3m} \div \frac{m^2+4mn+4n^2}{3m^2-2m} = \frac{m+2n}{2-3m }\times \frac{m(3m-2)}{(m+2n)^2} = - \frac{m}{m+2n}$