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August 29, 2015

Homework Help: Pre Algebra

Posted by Lily on Wednesday, June 11, 2008 at 5:37pm.

the problem is about adding and subtracting polynomials...

This is what I did...

2x+3+3x+1
=2x+3x+3+1
=5x+4

and

9x+11-5x+4
=9x-5x+11+4
=4x+15

but then, if I add both 5x+4+4x+15
=9x+19...

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