Question

If (x + 1/x) = 25, then find (x2 + 1/x2)

Answer 1

THERE YOU GO MATEY ..

REFER TO THE ATTACHMENT FOR YOUR ANSWER..

Answer 2

x+1/x= 25
(x+1/x)square (using identiy 1)
=x2 +1/x2+2×x×1/x = 25 square (squaring both sides)
=x2+1/x2+2 =625
x2+1/x2=625-2
x2-1/x2=623