6x^2-5xy-6y^2-2xz-23yz-20z^2 因式分解
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6x^2-5xy-6y^2-2xz-23yz-20z^2 因式分解
6x^2-5xy-6y^2-2xz-23yz-20z^2 因式分解
6x^2-5xy-6y^2-2xz-23yz-20z^2 因式分解
6x²-5xy-6y²-2xz-23yz-20z²
=6x^2-(5y+2z)x-6y^2-23yz-20z^2
=6[x^2-(5/6y+1/3z)x+(3/2y+2z)(-2/3y-5/3)z
=6(x-3/2y+2z)(x+2/3y+5/3z)
=(2x-3y+4z)(3x+2y+5z)
6x^2-5xy-6y^2-2xz-23yz-20z^2 因式分解
因式分解:6x^2-5xy+6y^2-xz-23yz-20z^2
(2X+Z-Y)/(X^2-XY+XZ-YZ)-(Y-Z)/(X^2-XY-XZ+YZ)
设x,y,z∈R+,xy+yz+xz=1,证明不等式:(xy)^2/z+(xz)^2/y+(yz)^2/x+6xyz≥x+y+zRt
6x^2-5xy-6y^2-2xz-23yz-20z^2=_______
已知x:4=y:5=z:6,求x^2+y^2-z^2/xy+xz+yz
解方程组(x+y)/xy=5/6,(y+z)/yz=-2/3,2(x+3)+xz=0
函数u(x,y,z)=4xy^3+5x^2y^6+xz的全微分du
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)
分解因式x^2+3xy-10y^2-x+9y-26x^2-15y^2-6z^2-xy-5xz+21yz
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求(2X+Z-Y)/(X^2-XY+XZ-YZ)-(2X+Y+Z)/(X^2+XY+XZ+YZ)
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