Question

resolva a equação (x + 1)²= 4x + 4

Answer 1

x² + 2x + 1 = 4x + 4
x² - 2x - 3 = 0
Delta = b² - 4ac
Delta = 4 -4*1*(-3)
Delta = 4 + 12
Delta = 16
x = -b +- raíz de Delta / 2a
x = 2 +- 4 / 2
x' = 2 + 4 / 2 = 3
x'' = 2 - 4 / 2 = -1

Answer 2

$(x+1)^2=4x+4\\\\x^2+2x+1=4x+4\\\\x^2-2x-3=0\\\\(x+1)(x-3)=0\\\\x=-1\ \ \ ou\ \ \ x=3$