(x-2y+3z)(x+4y-z)
因式分解x^2+2xy-8y^2+2zx+14yz-3z^2
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相关问题
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因式分解:x2y+y2z+z2x+xy2+yz2+zx2+3xyz
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分解因式x^2-3y^2-8z^2-2xy+2zx+14yz
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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-
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y^2+yz+z^2=a^2,z^2+zx+x^2=b^2,x^2+xy+y^2=c^2,yz+zx+xy=0.证明:(
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为什么（y3/z+z3/x+x3/y）(yz+zx+xy)>=(y2+x2+z2)2
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证明 (x+y+z)^2>3(xy+yz+zx)
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若3/x=2/y=5/z则xy+yz+zx/x^2+y^2+z^2=?
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x/3=y/2=z/5,(xy+yz+zx)/(x²+y²+z²)=
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3/x=5/y=7/z,则xy+yz+zx/x^2-2y^2+3z^2=
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已知：x2+y2+z2=xy+yz+zx,求证:x=y=z.