已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)÷(x^2+y^2)的值
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已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)÷(x^2+y^2)的值已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)
已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)÷(x^2+y^2)的值
已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)÷(x^2+y^2)的值
已知x+4y-3z=0,4x-5y+2z=0,xyz≠0,求(3x^2+2xy+z^2)÷(x^2+y^2)的值
由x+4y-3z=0和4x-5y+2z=0解得x=z/3,y=2z/3,代入(3x^2+2xy+z^2)÷(x^2+y^2)=16/5
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