5ab²-6[3/2a²b-2/3（4a²b+2ab²）]其中a=1,b=-1

5ab²-6[3/2a²b-2/3（4a²b+2ab²）]其中a=1,b=-1
5ab²-6[3/2a²b-2/3（4a²b+2ab²）]其中a=1,b=-1

5ab²-6[3/2a²b-2/3（4a²b+2ab²）]其中a=1,b=-1
5ab²-6[3/2a²b-2/3（4a²b+2ab²）]
=5ab²-9a²b+4（4a²b+2ab²）
=5ab²-9a²b+16a²b+8ab²
=13ab²+7a²b
=13-7
=6