Examine, whether the following number are rational or irrational:
Let `x=sqrt5-2` be the rational number
Squaring on both sides, we get
`rArr(x^2-9)/(-4)` is a rational number
`rArrsqrt5` is a rational number
But we know that `sqrt5` is an irrational number
So, we arrive at a contradiction
So `(sqrt5-2)` is an irrational number.
Concept: Concept of Irrational Numbers
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