Question

The rationalization factor of 2 + √5 is . a. √2 + 5 b. √2 − 5 c. 2 − √5 d. 2 − √3​

Answer 1

Answer:

Correct option is

B

352

Rationalising factor is a term with which a term is multiplied or divided to make the whole term rational.

Here, 235 can be written as 2×51/3.

In order to make it rational, we need to eliminate the surd.

Hence multiply it with a term so as to rationalise 35.

Multiplying by 352 we get, 2×51/3×52/3=2×53/3=10, hence rationalised.

Therefore, 352 is the required rationalising factor.

Hence, option B is correct.

Step-by-step explanation:

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Answer 2

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c. 2 − √5

We know that rationalization factory for a + √b is a - √b .

Hence rationalization factor of 2 + √5 is 2 - √5

Step-by-step explanation:

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