Answer
$x=0$ or $x=6$.
Work Step by Step
By factorization, we have
$$x^2 -6 x=x(x-6)=0.$$
Then we have
$$x =0, \quad \text{or} \quad (x-6)=0$$
that is $x=0$ or $x=6$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.