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April 20, 2014

April 20, 2014

Posted by **Dani** on Tuesday, October 4, 2011 at 10:12pm.

thanks

- algebra -
**Steve**, Wednesday, October 5, 2011 at 4:39amyou can only add terms with like powers of x. So,

5x^2 - 4 + -3x^2 - 9

= 2x^2 - 13

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