8(x^-2y^)-x(7x+y)+xy?
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8(x^-2y^)-x(7x+y)+xy?
![8(x^-2y^)-x(7x+y)+xy?](/uploads/image/z/20131799-23-9.jpg?t=8%EF%BC%88x%5E%EF%BC%8D2y%5E%EF%BC%89%EF%BC%8Dx%EF%BC%887x%EF%BC%8By%EF%BC%89%EF%BC%8Bxy%3F)
等于8×-16y-7X一Xy十Xy
等于 X一16y
等于 X一16y
分解因式 8(x²-2y²)-x(7x+y)+xy
3y/2x+2y+2xy/x²+xy 2x/x²-64y²-1/x-8y (1/a+1/b
(x+2y-3xy)-(-2x-y+xy),其中x+y=,xy=-,求值.
已知1/x-1/y=4,求(2x+xy-2y)/(x-2xy-y)的值
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
求齐次方程y(x^2-xy+y^2)dx+x(x^2-xy+y^2)dy=0.
求齐次方程y(x^2-xy+y^2)dx+x(x^2-xy+y^2)dy=0
已知x+4y=-1.xy=5.求代数式(6xy+7y)+[8x-(5xy-y+6x)]的值,
因式分解:8(x-2y)-x(7x+y)+xy.
X平方-XY-6Y平方+2X+14Y-8
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
分解因式:8(x^2-2y^2)-x(7x+y)+xy=