<PRE><B>Question 74683</B>
can some one check this before i turn it in please?
(2r-3s)(4r^2+6rs+9s^2)
WELL THIS MULTIPLICATION GIVES
8r^3+27s^3.....8R^3-27S^3 OK??CHECK YOUR MULTIPLICATION.
THIS IS A STD. FORMULA
(X-Y)(X^2+XY+Y^2)=X^3-Y^3



48r^4-162s^4....BUT WHAT IS THIS SUPPOSED TO BE?</PRE>