若x^2-6xy+9y^2=0.则x:y的值为

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若x^2-6xy+9y^2=0.则x:y的值为若x^2-6xy+9y^2=0.则x:y的值为若x^2-6xy+9y^2=0.则x:y的值为(x-3y)^2=0x=3yx:y=3:1x-3y-2=0，则

若x^2-6xy+9y^2=0.则x:y的值为
若x^2-6xy+9y^2=0.则x:y的值为

若x^2-6xy+9y^2=0.则x:y的值为
(x-3y)^2=0
x=3y
x:y=3:1

x-3y-2=0，则x-3y=2，(x-3y)^2=x^2-6xy+9y^2=2^2=4
x^2-6xy+9y^2-5=4-5=-1

x^2-6xy+9y^2=0
(x-3y)²=0
x-3y=0
x=3y
当x=3y≠0时，
x:y=3:1

若x^2-6xy+9y^2=0.则x:y的值为若2x^2-6xy+9y^2-4x+4=0,则y/x-x/y=若2x^2-6xy+9y^2-4x+4=0,则y/x-x/y=? 若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少? 若xy/x+y=2,则3x-5xy+3y/-x+3xy-y=?/是分之若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少? 若xy/x+y=2,则3x-xy+3y/-x+3xy-y= 若9x^2+y^2+24x-6y+25=0,则xy= 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 若x-y=4,xy=1,则(2x+y-2xy)-(3x+2y+xy)-(4xy+3y-5x)= x*x+xy=3,xy+y*y=2,则x*x+2xy+y*y=________? (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x，求x^3 - 6x^2y + 11xy^2 - 6y^3 思路x^3 - 6x^2y + 11xy^2 - 6y^3= x^3 - 3x^2y + 2xy^2 - 3x^2y + 9xy^2 - 6y^3= (x^2 - 3xy + 2y^2)(x - 3y)= (x^2 - 2xy - xy + 2y^2)(x - 3y)(x - y)(x - 2y)(x - 3y)求思路若实数x,y满足x^2-xy-y^2 =0,则x/y=? 已知x^2-6xy+9y^2=0,求(x-y)/(x+y) x y属于R 2^x=18^y=6^xy则x+y 若正实数x.y满足x+y=xy,则x+2y的最小值若x^2+xy+y=14,y^2+xy+x=28,求x+y 函数f(xy,x+y)=x^2+xy+y^2,则df(x,y)=?