5p2q −2pq2 +5pq −11q −3p +18 4p2q +5pq2 −3pq +7q −8p −10 (−) (−) (+) (−) (+) (+) ___________________________________ p2q −7pq2 +8pq −18q +5p +28 ___________________________________
Question 4 (iii)
Subtract 4p2q−3pq+5pq2−8p+7q−10from18−3p−11q+5pq−2pq2+5p2q.
(a) Subtract 4a − 7ab + 3b + 12 from 12a − 9ab + 5b − 3
(b) Subtract 3xy + 5yz − 7zx from 5xy − 2yz − 2zx + 10xyz
(c) Subtract 4p2q − 3pq + 5pq2 − 8p + 7q − 10 from 18 − 3p − 11q + 5pq − 2pq2 + 5p2q