Question

(2x+3) a quadrado - 9=12x respostas

Answer 1

(2x+3)^2-9=12x
2x^2+2.2x.3+3^2-9=12x
4x^2+12x+9-9=12x
4x^2+12x-12x+9-9
4x^2=0
x^2=0/4
x^2=0
x= raiz de 0
x=0