simplify:(a+1/a)^2+(a-1/a)^2
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Step-by-step explanation:
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Step-by-step explanation:
(a+1/a)² + (a-1/a)²
Put , (a+b)² + (a-b)²
= (a²+b²+2ab) + (a²+b²-2ab)
So,[ (a)² + (1/a)² + 2×a×1/a ] + [ (a²)+(1/a)²-2×a×1/a ]
= a² + 1/a² + 2 + a² + 1/a² - 2
= a² + a²+ 1/a²+ 1/a²
= 2a² + 2(1/a)² Ans.
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