Question

what should be added to p3+3p2q+q3 to get p3+q3​

Answer 1

Answer:

let the no.be x

x+p3+3p2q+3pq2+q3=p3+q3

x=p3+q3-(p3+3p2q+3pq2+q3)

x=p3+q3-p3-3p2q-3pq2-q3

x=-3p2q-3pq2

hope it helps you mate