试说明(4x*x-7X+6Y--1)-(-2x*x+3y*y+2Y+2X)+(-6X*X+9X-Y)的值于X无关.
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
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
已知[(y-2x)(3x+2y)+x(y+6x)]/3y,试说明式子的值与x无关.
1、x(x-y)(x+y)-x(x+y)^2
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方
因式分解3x^2(x-y)+6x(y-x)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
-6x-y-7x+6x-2y-10x+8y+x+6x-8y的值
试说明代数式-(3x²y+10x³)+3x³6x³y+3x的值与x,y都无关
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
(1)(x^2/x)-y-x-y