Question

Expansion of (a + 1/a) (a-1/a)

Answer 1

Step-by-step explanation:

using property (a+b)(a-b)= a²-b²

(a+1/a)(a-1/a) = a²+1/a²

Answer 2

Step-by-step explanation:

=(a+1/a)(a-1/a)

={(a^2) - 1}/a^2

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