Question

if x÷ y + y÷ x = -1 then the value of x cube - y cube is​

Answer 1

Ans

Step-by-step explanation:

[tex]\frac{x}{y} + \frac{y}{x} = -1

x^2 + y^2 + 1 = 0

So

x^3 - y^3 = (x-y)(x^2 + y^2 + 1 )

= 0