Question

If x+ 1/x=3 find x2+
1 /x2

Answer 1

$x + \frac{1}{x} = 3 \\ ( {x} + {\frac{1}{x} ) }^{2} = {3}^{2} \\ {x}^{2} + \frac{1}{ {x}^{2} } + 2x \frac{1}{x} = 9 \\ {x}^{2} + \frac{1}{ {x}^{2} } = 9 - 2 = 7$
please follow me

Answer 2

x(x+1/x)

as x+1/x =3

x(3)

answer is

3x