Question

Alguém me ajuda a resolver qualquer um desses exercícios ,

A- 12x2-24x=0
B-18x2+36x=0

Answer 1

a) 12x^2-24x=0
delta=b^2-4ac
delta=(-24)^2-4.12.0
delta=576-0
delta=576
x=-b-/+ raiz de delta/2a
x=-(-24)-24/2.12
x=24-24/24
x=0/24
x=0
x=-(-24)+24/2.12
x=24+24/24
x=48/24
x=2
b) 18x^2+36x=0
delta=b^2-4ac
delta=36^2-4.18.0
delta=1296-0
delta=1296
x=-b-/+ raiz de delta/2a
x=-36-36/2.18
x=-72/36 (:9)
x=-8/4
x=-36+36/2.18
x=0/36
x=0