Question

If x+ 1/x = 4, find x^2 + (1/x)^2

Answer 1

Answer:

x + 1/x = 4

Squaring both sides,

(x+1/x)2=42(x+1/x)2=42

or x2+(1/x2)+2=16x2+(1/x2)+2=16

or x2+(1/x2)=14

Hope it helps,

Alice Grinson