Question

those who will give accurate answer will be Mark as Brainlist​

Answer 1

Answer:

x^3+1/x^3=18

Step-by-step explanation:

$x^{2} +1/x^{2} =7\\x^2+1/x^2+2x(1/x)=7+2\\(x+1/x)^2=9\\x+1/x=3\\(x+1/x)^3=(3)^3\\x^3+1/x^3+3x(1/x)(x+1/x)=27\\x^3+1/x^3=27-3(3)=18$