Question

(×+3)ao quadrado +x=-3

Answer 1

(x+3)²+x=-3
(x+3).(x+3)+x=-3
x²+3x+3x+9+x=-3
x²+7x=-3-9
x²+7x=-12     (e se caso quiser igualar a zero, ficará)
x²+7x+12=0