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Addition and Subtraction of Algebraic Expression

What has to b...

Question

What has to be added to (a +b) to get (3a +2b)?

A

2a +3b

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B

2a +b

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C

4a +3b

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D

-2a -b

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Solution

The correct option is B 2a +b
Let x be the term to be added to (a +b) to get (3a +2b).

Given, (a +b) + x = (3a +2b)
or, x = (3a +2b) - (a +b)
so, x = 2a +b

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