Question

If x2 + 1/x2 = 27, find the values of
a) x+1/x
b) x - 1/x

Answer 1

Answer:

a) plus minus root over 29

b) plus minus 5

Step-by-step explanation:

x2 + 1/x2 = 27

(x+1/x)2 -2x.1/x = 27

(x+1/x)2 = 29

x+1/x = +- root 29

x2 + 1/x2 = 27

(x - 1/x )2 + 2x.1/x = 27

(x-1/x)2 = 25

x-1/x = +- 5

I hope u can understand.

thank u