Question

qual a resposta de 3x (x-4)=0

Answer 1

3x(x-4)=0
3x²-12x=0
3x(x-4)=0
3x=0
x=0
x=4
S: [0,4]

Answer 2

3x (x-4)=0
$3 x^{2}$-12x=0
x(3-12)
x=0
x=3-12x=-9