Posted by **Jenny** on Sunday, May 2, 2010 at 12:31pm.

Two questions actually. Please only respond with step-by-step answers. Feel free to change the numbers, I just need to know how to do it...

1.) Factor Completely:

4a^2 + 81 - 36a

2.) In a right triangle, find the length of the side not given. b= 2 c= sqrt. 13

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