Question

determine: (x+3).(x-2)=0

(com a conta)

Answer 1

(x+3)(x-2)=0 (aplicando a distributiva)
x²+3x-2x-6=0
x²+x-6=0 (resolvendo por formula de bhaskara)

-1+-√1²-4.1.-6/2.1
-1+-√25/2
-1+-5/2

X'=-1+5/2=4/2=2
X''=-1-5/2=-6/2=-3

X'=2 e X''=-3