Question

If x/y + y/x= -1, (x≠0 and y≠0 ) then find the value of x³-y³ is *

Answer 1

Step-by-step explanation:

if

y

x

+

x

y

=−1

simplifies to x

2

+xy+y

2

=0

as (x

3

−y

3

)=(x−y)(x

2

+xy+y

2

)=0 using above result