Question

Ajutoooooooooor!!!! nu stiu....!

Answer 1

$a) \frac{ x^{2} -4x+4}{ x^{2} -4}- \frac{3}{x+2} = \frac{(x-2)^2}{(x-2)(x+2)}- \frac{3}{x+2}= \frac{x-2}{x+2}- \frac{3}{x+2}= \frac{x-2-3}{x+2}= \frac{x-5}{x+2}$