Question

explain kar dena otherwise report answer​

Answer 1

Answer:

Rationalising factor of a number is a number whose product with given number gives a rational number .

☆ now here , we get a rational number when we multiply :-

$5 +2 \sqrt{3} \times 5 - 2 \sqrt{3}$

$= 25 - 12 = 13.$

therefore , option d is the answer .

Answer 2

Answer:

Rationalising the factor of 5+2√3 is

=>(5+2√3)(5-2√3)

=>(5^2-(2√3)^2)

=>(25-(4×3))

=>(25-12)

=>13

So,option d)5-2√3

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