Multiply the rational expressions.
(15/r^(2)-4r+4) X (r^(2)-4/30r^(2))

Question

Multiply the rational expressions.
(15/r^(2)-4r+4) X (r^(2)-4/30r^(2))

anonymous · Answer

$$\frac{ 15 }{ r ^{2}-4r+4 } \times \frac{ r ^{2}-4 }{ 30r ^{2} }$$

e.mccormick · Answer

OK.  Where did this giive you problems?

e.mccormick · Answer

And one early thing to do with this one is to factor both sides and d some canceling.  That will make the multiplication easier.

anonymous · Answer

I just want to be sure if its right. I got r+2/r^2(2r-4)

e.mccormick · Answer

AH.  OK.  Let me finish it then...

e.mccormick · Answer

If you are going to distribute the 2 on the bottom, you would also distribute the $r^2$.  As for the numbers you go, they are correct.

anonymous · Answer

Okay

e.mccormick · Answer

And I do not see anything else that would cancel, so you are in simplified form.

anonymous · Answer

I see. So what if I got r^2-4/2r^2(r^2-4r+4) ?

e.mccormick · Answer

That looks like it would have been without the canceling, which is not reduced form.  They generally want things as simplified as possible.  So on a hand grading, it would be partial credit at best.