Question

Como se resolve a 2?

Answer 1

$\sqrt{ x^{2} +2}=x+1$
$(\sqrt{ x^{2} +2})^{2} =(x+1)^{2}$
$x^{2} +2= x^{2} +2x+1$
$x^{2} - x^{2} +2x=2-1$
$2x=1$
$x=1/2$