Lots of homework for today
Notice the smiley...

http://img4.imageshack.us/img4/4572/algebra.png

thanks

2. you got a mistake in the 4 in the end...
its not -4, its a^2-4a+4=(a-2)^2...

3. hi
$\displaystyle \frac{a^2-4a+4}{2(a+2)(a-2)}=\frac{(a-2)^2}{2(a+2)(a-2) }=\frac{(a-2)}{2(a+2)}$

4. Originally Posted by klik11