说明代数式[(x-y)2-(x+y)(x-y)]÷(-2y)+y的值,与y的值无关.
说明代数式[(x-y)2-(x+y)(x-y)]÷(-2y)+y的值,与y的值无关.
试说明代数式[(x-y)^2-(x+y)(x-y)]除(-2y)+y的值与y的值无关
试说明代数式-(3x²y+10x³)+3x³6x³y+3x的值与x,y都无关
说明代数式-(3x平方y+10x立方)+3x立方+6x立方y+3x平方y-(6x立方y-7x立方)的值与x,y无关
试说明代数式(2y+3)(3y+2)-6y(y+3)+5y+16的值与y的值无关.
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
证明:代数式[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]/xy 的值为x,y的值无关 解方程 (x+
已知2x=y,求代数式[(x2+y2)-(x-y)2+2y(x-y)]÷(4y)的值.
试说明代数式-(3x^2y+10x^3)+3x^3+6x^3y+3x^2y-(6x^3y-7x^3)的值与x,y都无关
已知x=3分之1,y=二分之一,求代数式x-(x+y)+(x+2y)-(x+3y)+...-(x+13y)的值
试说明代数式(4x-7x+by-1)-(-2x的2次方+3y的2次方+2y+2x)+(-6x的2次方+9x-y)与X无关