Question

合并同類項2a3b-

1

2

a3b-a2b+

1

2

a2b-ab2

Answer 1

2a3b-

1

2

a3b-a2b+

1

2

a2b-ab2
=（2-

1

2

）a³b+（-1+

1

2

）a²b-ab²
=

3

2

a³b-

1

2

a²b-ab²