Question

(x+1)2 - 9, gnt?????

Answer 1

(X+1)2-9

(X+1).(X+1)

X2+X+X+1

X2+2X+1-9

X2+2X-8=0

Δ = b² - 4ac

=2² - 4.1.(-8)

= 4 + 32

Δ = 36

ai faz o calculo pra achar as raizes -b+ou-raizdedelta/2

ai fica

-2-6/2=-4

-2=6/2=2