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Question

The sum of 12abx, 2a2bx, 8abx and 8a2bx is


A

20abx + 10a2bx

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B

10abx + 20a2bx

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C

30a3b2x2

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D

none of the above

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Solution

The correct option is A

20abx + 10a2bx


Sum of 12abx, 2a2bx, 8abx and 8a2bx = 12abx + 2a2bx + 8abx + 8a2bx

= (12abx + 8abx) + (2a2bx + 8a2bx)

= 20abx + 10a2bx

This cannot be simplified further as abx and a2bx are unlike terms.


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