16x^2-4y^2-9z^2+12yz因式分解

16x^2-4y^2-9z^2+12yz因式分解 因式分解 (x+y+z)^2+yz(y+z)+xyz (2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ) 若x/3=y=z/4,且xy+xz+yz=76,求2x*x+12y*y+9z*z的值 4x^2-9y^2+12yz-4z^2因式分解 因式分解4x²-y²-2yz+z² 如果3y=x+2y,那么x *x+9*y*y+4*z*z-6xy-12yz+4xz的值是多少? 将多项式X^2-4Y^2-9Z^2-12YZ分解成因式的积,结果是A.(x+2y-3z)(x-2y-3z)B.(x-2y-3z)(x-2y+3z)C.(x+2y+3z)(x+2y-3z)D.(x+2y+3z)(x-2y-3z) 化简(2x-y-z/x^2-xy-xz+yz)+(2y-x-z/y^2-xy-yz+xz)+(2x-x-y/z^2-xz-yz+xy) 已知XY=2(X+Y),YZ=4(Y+Z),ZX=5(Z+X),求X,Y,Z已知XY=2(X+Y),YZ=4(Y+Z),ZX=5(Z+X),求X,Y,Z 化简x^2-yz/[x^2-(y+z)x+yz]+y^2-zx/[y^2-(z+x)y+zx]+z^2-xy/[z^2-(x+y)z+xy] 化简2y-3z/2yz+2z-3x/3zx+9x-4y/6xy 方程组xy/x+y=2 yz/y+z=4 zx/x+z=5 求x,y,z 若x/3=y/2=z/5,且xy+yz+zx=93,求9x*x+12y*y+2z*z的值. 已知x^3+y^3-z^3=96,xyz=4,x^2+y^2+z^2-xy+xz+yz=12,则x+y-z等于 如果3y=x+2z,那么x^2+9y^2+4z^2-6xy-12yz+4xz= 若X/3=Y/1=Z/4,且XY+XZ+YZ=76,求2X^2+12Y^2+9Z^2的值 (x+y-xy)/(x+y+2xy)=(y+z-2yz)/(y+z+3yz)=(z+x-3zx)/(z+x+4zx),且2/x=3/y=1/z,则xyz=?