Question

if x2+1/x =7 then find x2+1/x2​

Answer 1

Answer:

Step-by-step explanation:

x^2 + 1/x = 7

then

x^2 + 1/x^2

X^2 + (1/x)^2

X^4.1/X^2 + 2. x^2 .1/x^2 + 1/x^2       (a+b)^2 = a^2 + 2ab + b^2

x^2 + 2 + 1/x

x^2 + 1/x + 2

7 + 2 = 9           because   x^2 + 1/x = 7