[(2X-Y)²-Y(4X+Y)-8X]÷2X其中X=-1,Y=2化简求值
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[(2X-Y)²-Y(4X+Y)-8X]÷2X其中X=-1,Y=2化简求值
[(2X-Y)²-Y(4X+Y)-8X]÷2X
其中X=-1,Y=2
化简求值
[(2X-Y)²-Y(4X+Y)-8X]÷2X其中X=-1,Y=2化简求值
=[4x²-4xy+y²-4xy-y²-8x]/2x
=(4x²-8xy-8x)/2x
=2x-4y-4
x=-1,y=2时
2x-4y-4
=-2-8-4
=-14
2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y
因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT
x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗?
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化简再求值[(x²+y²)²-4x²y²]÷(x²-y²)其实,x=2,y=2/3.
[(x-y)²+(x+y)(x-y)]除以2x
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已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y 就是已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y /4y就是除以4y