3m²n+5mn²+6nm²-4n²m-n²m(合并同类项)(1)3m²n+5mn²+6nm²-4n²m-n²m(2)2/3a²-6a³+5a-1/4+5a³-1/2-4/3a²快

问题描述:

3m²n+5mn²+6nm²-4n²m-n²m(合并同类项)
(1)3m²n+5mn²+6nm²-4n²m-n²m
(2)2/3a²-6a³+5a-1/4+5a³-1/2-4/3a²

(1)3m²n+5mn²+6nm²-4n²m-n²m=(3m²n+6nm²)+(5mn²-4n²m-n²m)=9m²n(2)2/3a²-6a³+5a-1/4+5a³-1/2-4/3a²=(2/3a²-4/3a²)-(6a...