Question

if x^2+1/x^2=7, find the value of x^3+1/x^3​

Answer 1

Answer:

Step-by-step explanation:

(x + 1/x) = x + 1/x + 2

(x + 1/x) = 9

x + 1/x = 3

now

(x + 1/x) = x + 1/x + 3(x + 1/x)

27 = x + 1/x + 9

or

x + 1/x = 27 - 9 = 18

it should be the answer