How would I work this problem?

Question

x^2=-6x

Answer 1

1. SUBTRACT 6x FROM BOTH SIDES

X^2 - 6x = 0

2. NOW FACTOR OUT AN 'X'

X(X - 6) = 0

3. SO X = 0 OR 6

Answer 2

Thanks, that is what I did but I was not sure about it.