Question

F(x) =3x ao quadrado-6x

Answer 1

$F(x) =3x^2-6x\\3x^2-6x=0\\\\ x(3x-6)=0\\\\\\ x=0\\\\ 3x-6=0\to 3x=6\to x= \frac{6}{3} \to x=2\\\\\\ S=(0;2)$