1.

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

Answer»

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



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