Question

if x+1/x ≈9, find tge value of x^2+1/x^2​

Answer 1

Answer:

The answer is 79(approx)

Step-by-step explanation:

Given that : x + 1/x = 9

Squaring both sides

(x+1/x) ² = 81 [U.I. (a+b)²= a²+b²+2ab]

x²+1/x² + 2.x.1/x = 81

x²+1/x²+2 = 81

x²+1/x² = 81-2

x²+1/x² = 79

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