Question

Jumlah dari 3pq+4qr-r dan -3qr+2r-pq adalah

Answer 1

(3pq+4qr-r)+(-3qr+2r-pq)
= 3pq+4qr-r-3qr+2r-pq
= 2pq+qr+r

Answer 2

3pq+4qr-r + (-3qr+2r-pq)
= 3pq+4qr-r-3qr+2r-pq
= 3pq-pq+4qr-3qr-r+2r
= 2pq+qr+r