分解因式:x3(x+1)(y-z)+y3(y+1)(z-x)+z3(z+1)(x-y)
已知x+y+z=1,x2+y2+z2=2,x3+y3+z3=3,求xy(x+y)+yz(y+z)+zx(z+x)的值
因式分解(x+y+z)3-x3-y3-z3
因式分解X2(Y+Z)+Y2(Z+X)+Z2(X+Y)-(X3+Y3+Z3)-2XYZ
x3(y-z)+y3(z-x)+z3(x-y)
x3+y3+z3+(x+y)3+(y+z)3+(z+x)3因式分解
分解因式:(1):x(x-y)+y(y-X) 多项式(x+y-z)(x-y+z)-(y+z-X)(Z-x-y)的公因式是
不等式选讲设x,y,z为正数,证明:2(x3+y3+z3)≥x2(y+z)+y2(x+z)+z2(x+y).
(x加y加z)3次方--x3次方-y3次方-z3次方.
已知X+Y+Z=0,求X3次方+Y3次方+Z3次方等于多少?
已知x+y+z=2,x2+y2+z2=12则x3+y3+z3=
若x,y,z大于等于0,求证:x3+y3+z3大于等于3xyz
分解因式:xyz-yz-zx-xy+x+y+z-1