计算:3(y-z)^2-(2y+z)(-z+2y)
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
计算(x+2y-3z)的平方+(x-2y+3z)(x+2y-3z)
(x+2y+3z)-(3x+2y-z)+(2x-3y+4z) 用直式计算
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)
计算:3x-2y- [-4x+(z+3y)]
3(y-z)^2-(2y+z)(-z+2y)
x/2=y/3=z/5 x+3y-z/x-3y+z
C++计算x=2,y=3,z=4计算z+=x++||y++||++z求x,y,z的值
运用乘法公式计算:(x+2y-3z)(x-2y+3z)
若|x-2|+|Y+3|+|z-5|=O计算求|x|+|Y|+|z|的值
化简(y-x)(z-x)/(x-2y+z)(x+y-2z)+(z-y)(x-y)/(x-2z+y)(y+z-2x)+(x