
Find the rationalizing factor of:
A.
B.
C.
D. None of the above
Answer
535.5k+ views
Hint: The factor of multiplication by which rationalization is done is called the rationalizing factor. So, rationalize the given expression by using the formula twice to obtain the required answer.
Complete step-by-step answer:
Rationalising factor means the term by which we convert irrational numbers to rational numbers.
So, it means we have to choose a term by which we make is a rational number.
We know that,
Since,
And
Therefore, which is a rational number.
Hence, is a rational number .
Thus, the correct option is A.
Note: In this question, the given expression is a Surd. If the product of two or more surds is a rational number then they are rationalizing factors to each other. Sometimes we divide to get the rationalizing factor.
Complete step-by-step answer:
Rationalising factor means the term by which we convert irrational numbers to rational numbers.
So, it means we have to choose a term by which we make
We know that,
Since,
And
Therefore,
Hence,
Thus, the correct option is A.
Note: In this question, the given expression
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