多项式1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc,其中a=-1,b=-3,c=1的值是()
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![多项式1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc,其中a=-1,b=-3,c=1的值是()](/uploads/image/z/2743183-55-3.jpg?t=%E5%A4%9A%E9%A1%B9%E5%BC%8F1%2F2a%26%23178%3Bb-%5B3%2F2a%26%23178%3Bb-%EF%BC%883abc-a%26%23178%3Bc%EF%BC%89-4a%26%23178%3Bc%5D-3abc%2C%E5%85%B6%E4%B8%ADa%3D-1%2Cb%3D-3%2Cc%3D1%E7%9A%84%E5%80%BC%E6%98%AF%EF%BC%88%EF%BC%89)
多项式1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc,其中a=-1,b=-3,c=1的值是()
多项式1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc,其中a=-1,b=-3,c=1的值是()
多项式1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc,其中a=-1,b=-3,c=1的值是()
1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc
=1/2a²b-[3/2a²b-3abc+a²c-4a²c]-3abc
=1/2a²b-[3/2a²b-3abc-3a²c]-3abc
=1/2a²b-3/2a²b+3abc+3a²c-3abc
=3a²c-a²b
=3-(-3)
=6
6
-3
先化简去掉括号1/2a²b-[3/2a²b-(3abc-a²c)-4a²c]-3abc
=1/2a²b-3/2a²b+3abc-a²c+4a²c-3abc
= -1/a²b +3a²c
带入值 得 -1/(-3)+3=10/3