If (z + \frac{1}{z}) ^{2} = 98, compute (z^{2} + 1\/ \:z^{2}\:)

GATE Computer Science (CS) 2014 Shift 1 Solved Paper

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(z + \;{1}/{z}) ^{2} = 98

, compute

(z^{2} + 1\/ \:z^{2}\:)

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