Question

Resolva a equação
e) (x+1)² = 7 + x

Answer 1

Explicação passo-a-passo:

(x+1)²=7+x

(x+1).(x+1)=7+x

x²+x+x+1=7+x

x²+2x+1-7-x=0

x²+x-6=0

a=1 b=1 c=-6

Δ=b²-4ac

Δ=1²-4.1.-6

Δ=1+24

Δ=25

x=-b+ou-√Δ/2a

x'=-1+5/2

x'=4/2

x'=2

x"=-1-5/2

x"=-6/2

x"=-3