Question

(6x+2)²-16=0, me ajudem :|

Answer 1

Olá,

faça assim:

$(6x+2)^2-16=0\\ (6x+2)^2=16\\ (6x+2)=\pm \sqrt{16}\\ 6x+2=\pm4\\\\ \begin{cases}6x+2=4~~~~~~~~~~~~~6x+2=-4\\ 6x=4-2~~~~~~~~~~~~~6x=-4-2\\ 6x=2~~~~~~~~~~~~~~~~~~6x=-6\\ x= \dfrac{2}{6}~~~~~~~~~~~~~~~~~~x= \dfrac{-6}{~~6} \\\\ x'= \dfrac{1}{3}~~~~~~~~~~~~~~~~~~x''=-1\end{cases}\\\\\\ S=\left\{\dfrac{1}{3},-1\right\}$

Tenha ótimos estudos ;D