Answer: x = 0 or x = 3
Step-by-step explanation: Before trying to factor right away, notice that we have a greatest common factor of 12x that can be factored out.
So we have 12x(x - 3) = 0.
This means that either 12x = 0 or x - 3 = 0.
Solving each equation from here, we get x = 0 or x = 3.