(x-y+z)(x+y+z)等于多少?
(x-y+z)(x+y+z)等于多少.
如果30/7=x+ 1/(y+1/z)那么x+y+z等于多少
①(x+y+z)(-x+y+z)(x-y+z)(x+y-z)
z分之x+y等于y分之x+z等于x分之y+z(x+y+z不等于零)求x+y+z分之x+y-z的值
已知x+y=3,y+z=4,x+z=5,则x+y+z等于( )
x分之y+z=y分之z+x=z分之x+y(x+y+z不等于0),求x+y+z分之x+y-z
c语言中负数的非等于多少?intx,y,z且x=3,y=-4,z=5求!(x>y)+(y!=z)或(x+y)与(y-z)
(x减2y加z)(x加2y减z)等于什么
(x+y+z)*(-x+y+z)*(x-y+z)*(x+y-z)=
计算:(x+y+z)(-x+y+z)(x-y+z)(x+y-z).
X+Y+Z=200,1/3X+4Y+5Z=200,求X,Y,Z等于多少?
x+y=10 y+z=15 z+x=20 求x,y,z等于多少?