Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Can anyone help me factor this equation?

(One hundred sixty)(one minus q divided by four)(ten plus q divided by 4)

share|improve this question
2  
Hi! Is the expression you wanted to write $160(\frac{1-q}4)(\frac{10+q}4)$? Because this expression is already factored... unless you want $10(1-q)(10+q)$ by putting the $4$'s below $160$. –  Patrick Da Silva Jun 2 '12 at 20:49

1 Answer 1

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)

share|improve this answer
1  
It seems like an odd thing to do to multiply it out and then factor it back in again... what are you trying to achieve that you couldn't just do directly? –  Ben Millwood Jun 2 '12 at 22:40
    
@benmachine: Right you are. You can just do as Patrick Da Silva suggested (in another interpretation) and distribute the $4$'s in. –  Ross Millikan Jun 3 '12 at 1:19

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.