Question

If x + 1/x = 4 find the value of x ^2+ 1/x^2​

Answer 1

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)