Question

(x+3)*=1preciso com urgência

Answer 1

(x+3)^2 = 1
x^2 + 2.3.x +3^2 = 1
x^2 + 6x + 9 = 1
x^2 + 6x + 9 - 1 = 0
x^2 + 6x + 8 = 0
a=1; b = 6; c = 8
∆ = b^2-4ac
∆ = 6^2 - 4.1.8
∆ = 36-32
∆ = 4

x = [- b +/- √∆]/2a
x = [ - 6 +/- √4]/2.1

x' = [-6-2]/2 = -8/2 = - 4
x" = [-6+2]/2 = -4/2 = -2