作业帮1、-5/3ab³+2a³b-9/2a³b-1/2a²b-a³b 2、4x²-[6x-(3x-1)-2x²]
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1、-5/3ab³+2a³b-9/2a³b-1/2a²b-a³b 2、4x²-[6x-(3x-1)-2x²]
1、-5/3ab³+2a³b-9/2a³b-1/2a²b-a³b 2、4x²-[6x-(3x-1)-2x²]
1、-5/3ab³+2a³b-9/2a³b-1/2a²b-a³b 2、4x²-[6x-(3x-1)-2x²]
1、-5/3ab³+2a³b-9/2a³b-1/2a²b-a³b
=-5/3ab³-7/2a³b-1/2a²b
2、4x²-[6x-(3x-1)-2x²]
=4x²-6x+3x-1+2x²
=6x²-3x-1