Jawapan

2016-06-02T21:24:33+08:00
A) pq - 2p^2 + 4q^2 - 8pq
    = - 2p^2 + 4q^2 - 7pq

b) 2m^2 - hm + 4mh - 2h^2 - 3mh + 21
    = 2m^2 - 2h^2 + 21
2016-06-03T19:48:16+08:00
A) pq-2p^2+4q^2-8pq
b) 2m^2-mh+4mh-2h^2-3mh+21
    2m^2-2h^2+21