(x+y+z)²-(x-y-z)²等于多少要步骤
(x-y+z)(x+y+z)等于多少.
已知x-y+z=0,求(x²-y²-z²)-4y²z²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
x³+y³+z³-3xyz为什么等于(x+y+z)(x²+y²+z
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)
对于任何整数m,多项式(4m+5)²-9都能被几整除 多项式(x+y-z)(x-y+z)-(y+Z-x)(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)=