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December 20, 2014

December 20, 2014

Posted by **B.B.** on Wednesday, April 21, 2010 at 10:14am.

Add. (x^9-2)+(x^9+2).

Here is what I did:

(x+x)^9+(-2+2)

2x^9+0

Is this correct? If not could you please explain it to me?

Thanks.

- Math -
**PsyDAG**, Wednesday, April 21, 2010 at 10:47amRight! However, you do not need to include "+0."

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