【(x-2y)-x(x-4y) -8xy】÷4y用八年级数学知识解答,

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8(x^-2y^)-x(7x+y)+xy? 已知x*x-xy=-3,2xy-y*y=-8求2x+4xy-3y*y 化简求值【(x-2y)2-x(x-4y) -8xy】÷4y,其中x=-1.5,y=2, 化简求值【(x-2y)2-x(x-4y) -8xy】÷4y,其中x=-1.5,y=2, 化简求值【(x-2y)2-x(x-4y) -8xy】÷4y,其中x=-1.5,y=2 x+y=4,xy=-12,求x^+y^,x^-xy+y^实际求:x平方+y平方和x平方-xy+y平方 1.(-2a)³·b²÷(8a³b²) 2.-5x(2x²-3x+4)+4x³+15x3.(x²-2y²)(x+2y)-2xy(x-y)4.(x-y+z)(x-y-z)化简求值 [(x+y)(x-y)-(x+y)²-2y(x-2y)]÷(-2y),其中x=5,y=2003 因式分解(x+y)平方-4xy x^2+y^2+4y-96=0 求xy x,y为正整数 已知x+y=1,xy=-2分之1,利用因式分解求:x(x+y)(x-y)-x(x+y)²的值 已知y=√(x-1/2)+√1/2-x+8 求代数式x²-4y²/x-2y-x/+y²+2xy/x²+xy已知y=√(x-1/2)+√1/2-x+8求代数式x²-4y²/x-2y-x/+y²+2xy/x²+xy÷(1/x+1/y)的值. 化简分式{X-Y+(4XY)/(X-Y)}{X+Y-(4XY)/(X+Y)}的结果是? 已知3x-y+2z=x+2y+3z=0,求(3x^-xy+2y^)/(2x^+4xy+y^)值? 化简:(x-y)/(2x+1) * [(2x+1)/(x+y) - (2xy+y)/(y方-x方)]+y/(x+y) 已知1/x-1/y=4,求(2x+xy-2y)/(x-2xy-y)的值 已知x-y=-3,-x+3y=2,求代数式x^2-4xy+3y^2的值.这题中.x^2-4xy+3y^2=(x-3y)(x-y) 是如何算的.已知x-y=-3,-x+3y=2,求代数式x^2-4xy+3y^2的值.这题中.x^2-4xy+3y^2=(x-3y)(x-y) 是如何算的.=(x-y)(x+y)-4y(x-y xy-xy分之2xy-y和x-4分之4-4x+x求化简 分解因式 8(x²-2y²)-x(7x+y)+xy