Question

(ii) Add: 2p( q - p - r) and 2r (q - r - p)

Answer 1

Answer:

2p( q - p - r) +2r (q - r - p)

= 2pq- 2p²-2pr+ 2qr-2r²-2pr

= 2pq- 2p²+2qr-2r²-4pr