Question

If a= 5+2 √6 then find the value of a² = 1/a²

Answer 1

Answer:

4

Step-by-step explanation:

a=5+2$\sqrt{6}$

therefore, 1/a = 5-2$\sqrt{6}$ [rationalizing the denominator]

after calculation, we get

a²- 1/a² = 4

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