Question

(X+3)×(X+2)= Resposta Dessa Resolução

Answer 1

(x+3).(x+2)=0
x²+2x+3x+6=0
x²+5x+6=0
a=1 b=5 c=6

Δ=b²-4.a.c
Δ=5²-4.1.6
Δ=25-24
Δ=1

X=-b+ou-√Δ/2.a
X=-5+ou-√1/2.1
X=-5+ou-1/2

X'=-5+1/2
X'=-4/2
X'=-2

X''=-5-1/2
X''=-6/2
x''=-3

S={-2,-3}