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December 19, 2014

December 19, 2014

Posted by **sam** on Tuesday, January 11, 2011 at 3:05pm.

- algebra -
**PsyDAG**, Wednesday, January 12, 2011 at 3:34pmI assume you want it factored.

Find two numerical factors for the two end terms that will add to get you the middle term.

9 * 9 or 27 * 3 or 81 * 1

2 * 2 or 4 * 1

(9 * 2) + (9 * 2) = 36

Now all you need to do is to pay attention to the negative sign.

(9r-2s)(9r-2s)

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