计算(x-2y+3x)(x+2y+3z)
计算:3x-2y- [-4x+(z+3y)]
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
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
1.(x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2)
计算:1.(-x+2y+3z)(x-2y-3z) 2.[(x/2+3y)^2-(y/2+x)^2+(3x-2/y)^2-
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
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
计算:(-x-2y) * (3x-y)
计算(x+y)(x+y)^2(-x-y)^3