Can anyone help me factor this equation?
(One hundred sixty)(one minus q divided by four)(ten plus q divided by 4)
It would be much easier to be sure what you mean if you write the equation. You could see this from the faq or at least write 160(1-q/4)(10+q/4). If you type in line, please make sure there are enough parenetheses to be unambiguous. If you mean $160(1-\frac q4)(10+\frac q4)$ it is already factored in one sense. What you probably want is first to multiply it out, giving $160(1-\frac q4)(10+\frac q4)=-10q^2-360q-1600=10(q-4)(q+40)$. To find the factors, you can first factor our the $10$ by inspection, then try factors of 160 to find the roots (see the rational root theorem)