Hi, I have this part of a question that gets me:

I did all the previous steps and got to an equation that must =0:

x^2(-x+12)=0

I know that making x=12 is one value, but for the x^2 part, do i just ignore it?

In my answer book it says x=12 and nothing else, so I'm presuming its something to do with real values of x (even though I don't really know what a 'real' value of x is).

Thanks