Question

consideram expresia E(x)
$( \frac{2}{x-2} + \frac{x}{x+2} ): \frac{ x^{2} +4}{ x^{2} -x-2}$

Answer 1

$E(x)= \dfrac{2x+4+x^2-2x}{(x-2)(x+2)}\cdot\dfrac{(x-2)(x+2)}{x^2+4}=\dfrac{x+1}{x+2}$