Question

if p/q+q/p= -1, Then p^3-q^3= ?

Answer 1

Answer:

0

Step-by-step explanation:

p/q+q/p=-1

p^2+q^2/pq=-1

p^2+q^2=-pq

p^2+q^2+pq=0

p^3-q^3=(p-q)(p^2+pq+q^2)

=0(p-q)

=0