Question

x-1/X=3then the value of X2+1/x2

Answer 1

here it is
hope it will help you

Answer 2

If x=3, i.e. ,
x - 1 = 3 - 1 = 2.
Then,
X2 + 1 /x2
= 2(2) + 1 / 2(2)
= 4 + 1 / 4
= 5 / 4
$= \: 1 \frac{1}{4}$