If x =√5 + 2 then find value of x-1/x
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ganesh3533:
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Solution:
Given:
Now,By rationalizing the denominator,we get:
The answer is 4.
Rationalising:
It is a process by which the roots in the denominator are eliminated.
Rationalising factor:
A term which is multiplied to make the number a rational.
For example,
1/√7=1/√7×√7/√7=√7/7
Here,√7/√7 is the rationalising factor
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