SOLUTION: Fidn the sum of -5ab+7ab+(-9ab)+ab+(-2ab).

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Question 182703: Fidn the sum of -5ab+7ab+(-9ab)+ab+(-2ab).
Answer by Mathtut(3670) About Me  (Show Source):
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-5ab+7ab+(-9ab)+ab+(-2ab). these terms are all alike so just add the coefficients together to find the total of the ab term -5+7-9+1-2=-8
:
-8ab