Simplify the like terms in 3a - 2b – ab - (a – b + ab) + 3ab + b – a. The final expression is:

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a + ab

a + 9ab

3a + 5ab

-a + 4ab

answer is A.

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Detailed Solution

Given an expression 3a - 2b – ab - (a – b + ab) + 3ab + b – a.
Rearrange the variable and similar terms together,
= 3a – a – a - 2b + b + b – ab – ab + 3ab
Now, using addition and subtraction operation
= a + ab
The simplified expression is a + ab.
Hence, option 1 is correct.

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