Question

if x + 1/x = 5 then what is x^2 +1/x^2

Answer 1

(x+1/x)=5

(x+1/x)^2=25

x^2+1/x^2+2=25

x^2+1/x^2=23

so your answer is 23

Answer 2

Hy!
x+1/x=5
On sq both sides
X sq +1/xsq +2.X.1/x=25
X sq +1/X sq =25-2=23 ans