If x + 1/x = 4 find the value of x ^2+ 1/x^2
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Answer:
x+1/x = 4
(a+b)² = a²+b²+2ab
(x+1/x)² = x²+1/x²+2(x × 1/x)
putting value of x+1/x
(4)² = x²+1/x²+2
16 = x²+1/x²+2
x²+1/x² = 16-2
= 14 (answer)
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