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Question

15ab2 + 2ab2x + 3ab2 + 2ab2x + 2ab2 = _____


A

4ab2 + 20ab2x

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B

24a2b4x

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C

20ab2 + 4ab2x

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D

24ab2x

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Solution

The correct option is C

20ab2 + 4ab2x


15ab2 + 2ab2x + 3ab2 + 2ab2x + 2ab2

= (15ab2 + 3ab2 + 2ab2) + (2ab2x + 2ab2x)

= (15+3+2)ab2 + (2+2)ab2x

= 20ab2 + 4ab2x

This cannot be simplified further as 20ab2 and 4ab2x are unlike terms.


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