怎样化简:4x^3(-y^3)^2-3x(-x)^2(-y^2)^3

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/19 10:52:38

怎样化简:4x^3(-y^3)^2-3x*(-x)^2*(-y^2)^3

2y²-3x-y)-2*(2x²-3xy+y²-x+2y)
=4x²-6xy+2y²-3x-y-4x²+6xy-2y²+2x-4y
=-x-5y

因为/x-2a/+(y+3)²=0
所以 (y+3)²=0 解得y=-3
/x-2a/=0
/x-2(-x-5y)/=/x+2x+10y/=/3x+10y/=/3x+10*(-3)/=/3x-30/=0
解得x=10
A=2x²-3xy+y²-x+2y=(x-y)(2x-y)-x+2y=13*23-10-6=283
B=4x²-6xy+2y²-3x-y=2(2x²-3xy+y²)-3x-y=2*13*23-30+3=571

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