Question

Solve for x, 2[x²+1/x²]-9[x+1/x]+14=0

Answer 1

Sol. 2(x2 + 1/x2 ) – 9(x+1/x) + 14 = 0. ∴ 2[(x + 1/x)2 – 2] - 9(x+1/x) + 14 = 0. [∵(x 2 + 1/x2 ) = [(x + 1/x)2 – 2]. Put x + 1/x ...

Answer 2

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