Question

factorise the expression by regrouping​

Answer 1

Step-by-step explanation:

ab(p^2+q^2) - pq(a^2+b^2)

abp^2 + abq^2 - a^2pq - b^2pq

abp^2 - a^2pq + abq^2 - b^2pq

ap(bp-aq) + bq(aq-bp)

ap(bp-aq) - bq(bp-aq)

(bp-aq)(ap-bq)