Question

If x² + 1 by x² = 27 find the value of x-1 by x

Answer 1

Answer:

by using the formula of (a+b)2

Step-by-step explanation:

X²+1/x² = 27

(x)²+(1/x)²+2(x)(1/x) = 29

using formula ,

a²+b²+2ab = (a+b)²

(x+1/x)² = 29

x+1/x = √29