Question

faça a multiplicação


x+2       x-2
____ . _____
x            2x

Answer 1

$\dfrac{x+2}{x} \times \dfrac{x-2}{2x}=0\\\\ \dfrac{(x+2)(x-2)}{2x^2}=0\\\\ \dfrac{x^2-2x+2x-4}{2x^2}=0\\\\ \dfrac{x^2-4}{2x^2}=0\\\\ x^2-4=0(2x^2)\\ x^2 =4\\ x=\pm\sqrt{4}\\\\ \boxed{x'=2\ \ \ e\ \ \ x''=-2}$

Bons estudos!