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Question

The least rationalising factor of  5x is ______.



A

5

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B

5x

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C

x

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D

x

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Solution

The correct option is D

x


We know that (5x)×x=5x which is a rational number.

Also, (5x)(5x)=25x which is a rational number.

 x is the least rationalising factor.


Mathematics

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