作业帮计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
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计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
计算xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜求当a=-4,b=-3,c=1时，代数式3a²b-[2a²b-(2abc-a²c)-4a²c]-abc的值
xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
=xy-｛2分之1x²-[3y²-2x-3y]-1﹜
=xy-｛2分之1x²-3y²+2x+3y-1﹜
=xy-2分之1x²-3y²-2x-3y+1
xy-｛2分之1x²-[3y²-(2x+3y)]-1﹜
=xy-[2分之1x²-(3y²-2x-3y)-1]
=xy-(2分之1x²-3y²+2x+3y-1)
=xy-2分之1x²+3y²-2x-3y+1