Question

. If x² + = 47, find the value of x + 1/ X​

Answer 1

x²+1/x² = 47

Adding 2.x.1/x both sides.

x² + 1/x + 2.x.1/x = 47 + 2.x.1/x

(x+1/x)² = 49

x + 1/x = √49

x + 1/x = $\pm{7}$