Monday

October 20, 2014

October 20, 2014

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

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

- algebra -
**PsyDAG**, Monday, May 3, 2010 at 11:52am1.) 4a^2 -36a + 81

What are factors of 81? (3 * 3 * 3 * 3)

What are factors of 4? (2 * 2)

What combination of these factors (or the whole number) can give you -36 for the middle term?

2.) Pythagorean theorem

a^2 + b^2 = c^2

a^2 + 4 = 13

Can you work it from here?

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