Question

X + 1 / x = 16,x^2+1/x^2=?find the value

Answer 1

x + 1/x = 16
or, (x+1/x)² = (16)²
or, x² + 1/x² + 2.x.1/x = 256
or, x² + 1/x² + 2 = 256
or, x² + 1/x² = 256 - 2
or, x² + 1/x² = 254

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