SOLUTION: how do i do this problem? (7m2 -9m -8 )+(5m2+10m+4)

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Question 726634: how do i do this problem?
(7m2 -9m -8 )+(5m2+10m+4)

Answer by tanjo3(60)   (Show Source): You can put this solution on YOUR website!
Remove parentheses:

Combine like terms:

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