Question

(x-4) ao quadrado = 64

Answer 1

vamos lá....

$(x-4)^2=64 \\ (x-4)=\pm \sqrt{64} \\ x-4=\pm8 \\ \\ x-4=8~~~~~~~~~~~~~~x-4=-8 \\ x=8+4~~~~~~~~~~~~~x=-8+4 \\ x=12~~~~~~~~~~~~~~~~~~~~x=-4 \\ \\ S=\{-4,12}$