christinanwilli christinanwilli

24-02-2018
Mathematics

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(-3ab+7a-2) - (-9ab-4)

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creeds25 creeds25

24-02-2018

Given:
(-3ab+7a-2) - (-9ab-4)
Expand the expression using plus/minus rule.
-(-a)=a and -(a)=-a
=-3ab+7a-2 + 9ab +4
Add like terms
=6ab+7a+2

Answer: 6ab + 7a + 2

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