Math
posted by Kiki .
When mn+m^230n^2 is divided by m5n, what is the quotient. Thank you

what is (m5n)(m+6n)/(m5n) ?
Don't be put off by the extra variable. You can easily factor
m^2+m30, right? That's what you have if n=1. 
I don't understand. Then what is the final answer

ahem
(m5n)(m+6n)/(m5n) = m+6n
!! 
There is an interesting video showing how to do long division with two variables at
http://www.mathsisfun.com/algebra/polynomialsdivisionlong.html
Scroll most of the way down the page to where the heading is "More than One Variable".
Follow its method using your problem and it should become clear. 
Thanks