Question

(5pq + 2rs)^2 − (5pq − 2rs) 2^ 2 divided by 40

Answer 1

we know that, (a+b)²-(a-b)²=4ab

[(5pq + 2rs)² − (5pq − 2rs)²]²

40

= [4(5pq)(2rs)]²

40

= (40pqrs)²

40

= 40×40(p²q²r²s²)

40

= 40p²q²r²s²

I hope this answer helps you.