Question

pls help................

Answer 1

$( {x - \frac{1}{x} })^{2} = {x}^{2} + { \frac{1}{x} }^{2} - 2 \\ \\ {7}^{2} = { {x}^{2} + \frac{1}{x} }^{2} - 2 \\ \\ {x}^{2} + { \frac{1}{x} }^{2} = 49 + 2 = 51$

aaise hi iska square karke 2nd nikal lo

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