{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y
(x-y)的3次方-2(x-y)(y-x)的平方-3(x-y)的4次方除以(y-x)
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
化简:【(x-y)的2次方+(x+y)(x-y)】除以2x,其中x=3,y=1.5
【(x-y)^2+(x+y)(x-y)】除以 2x
已知x除以2=y除以3=z除以4,且x≠0,求x+y+z除以x-2y+3z的值,
化简求值:【(x+2y)的2次方-(x+y)(x-y)-7y的2次方】除以2y,其中x=-1,y=-2
已知2x-y除以x+y等于2,求代数式(4x-2y除以x+y)-(4x+4y除以2x-y)的值
x,y,z正整数 x>y>z证明 x^2x +y^2y+z^2z>x^(y+z)*y^(x+z)*z^(x+y)
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x
计算[x-2y]4次方除以[2y-x]的二次方除以[x-2y]结果为?