Question

COMO RESOLVE SEM DESENVOLVERO QUADRADO A EQUAÇAO (X-2)2=9

Answer 1

Oi Jenifer,

só fazer..

$(x-2)^2=9\\ x-2=\pm \sqrt{9}\\ x-2=\pm3\\\\ \begin{cases}x-2=3~~~~~~~~~~~~~~~~~~~x-2=-3\\ x=3+2~~~~~~~~~~~~~~~~~~~x=-3+2\\ x'=5~~~~~~~~~~~~~~~~~~~~~~~x''=-1\end{cases}\\\\\\\\ \Large\boxed{\boxed{S=\{5,-1\}}}$

Tenha ótimos estudos ;D