SOLUTION: Multiply using the vertical method. (2r - 3s)(4r^2 + 6rs + 9s^2) I'm struggling. Help. Thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Multiply using the vertical method. (2r - 3s)(4r^2 + 6rs + 9s^2) I'm struggling. Help. Thank you       Log On


   

Question 27566: Multiply using the vertical method.
(2r - 3s)(4r^2 + 6rs + 9s^2)

I'm struggling. Help.
Thank you

Answer by wuwei96815(245) About Me  (Show Source):
You can put this solution on YOUR website!
4r^2 + 6rs + 9s^2
2r -3s
_________________
-12r^2s -18rs^2 -27s^3
8r^3 + 12r^2s + 18rs^2
___________________________
8r^3 - 27s^3

Multiply all terms on the top line by all terms on the second line.
Then, add all like terms.
I hope that is right.