Posted by Sabrina on Friday, September 24, 2010 at 5:34pm.
I cannot figure this out! I know that the top is essentially the same as the bottom. SO what do I do?
(r^2-64)/(r+8)^2=
(r^2-64)/(r^2+64)=
0 ?
not correct
do it this way ...
(r^2-64)/(r+8)^2
= (r+8)(r-8)/[(r+8)(r+8)]
= (r-8)/(r+8)
Geez. Thank you so much.
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