Question

(x+1)²=9 e ajudem pelo amor e Deusssssss

Answer 1

(x+1)^2=9
x^2+2.x.1+1^2=9
x^2+2x+1=9
x^2+2x+1-9
x^2+2x-8=0
delta=b^2-4ac
delta=2^2-4.1.(-8)
delta=4+32
delta=36
x=-b-/+ raiz de delta/2a
x=-2-6/2.1
x=-8/2
x=-4
x=-2+6/2.1
x=4/2
x=2
S={(-4, 2)}

Answer 2

(x+1)²=9
x²+2x+1=9
x²+2x-8=0
∆=4-4.1.-8
∆=4+32
∆=36

-2±√∆
....2

x1=-2+6=4/2=2
.........2
x2=-2-6=-8/2=-4
..........2

r: x é igual a 2 ou -4, s={2,-4}