Question

x^3-1/x^3 if x-1/x=√5​

Answer 1

Answer:

8√5

Step-by-step explanation:

x^3-1/x^3

(x-1/x)(x^2+1/x^2+x*1/x)

√5*[(x-1/x)^2+2*x*1/x+1]

√5*[(√5)^2+2+1]

√5(5+3)

8√5

Answer 2

Answer:

I think it is helpful to you