Question

x+1/x=9 find x²+1/x²​

Answer 1

Step-by-step explanation:

X^2 + 1/x^2 = ( x+ 1/x) ^2 -2

= (9)^2-1 = 81-2 = 79

Answer 2

$\bold {\pink{\green {\sf\underline{Step\:by\:step\:explanation:-{\boxed {}}}}}}$

$⟹ {x^2+1/x^2} = {(x+1/x)^2-2}$

$⟹ {(9)^2-1} = {81-2}$

$⟹ {} \red {79}$