3y(x-1)^2-4x(1-x)^2
1、x(x-y)(x+y)-x(x+y)^2
(x+2)(x+3) (x-4)(x+1) (y+4)(y-2) (y-5)(y-3)
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
若2x-3y+4=0则x(x*x-1)+x(5-x*x)-6y+7
计算(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1); (3x-y)(y+3x)-(4x-3x)(
(1)(x^2/x)-y-x-y
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
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
分解因式计算:x^2(x-y)+(y-x)=?x^3+x^2+1\4x=?(2x+y)^2-(x-2y)^2=?
9y=3x-(x-1),4(x+y)-(2x+4)=8y
函数,y=3x/(x^2+x+1) ,x
函数y=3x/(x^2+x+1) (x