已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值(1)xy(2)x/y(3)x+y(4)x-y为什么?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 15:35:28
![已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值(1)xy(2)x/y(3)x+y(4)x-y为什么?](/uploads/image/z/1591549-61-9.jpg?t=%E5%B7%B2%E7%9F%A57+x%EF%BC%BE2+%2B+5y+x%EF%BC%BE2%3D12xy%2C%E5%B9%B6%E4%B8%94xy%E4%B8%8D%E7%AD%89%E4%BA%8E0%2C%E5%88%99%E5%8F%AF%E6%B1%82%E5%87%BA%EF%BC%88%EF%BC%89%E7%9A%84%E5%80%BC%EF%BC%881%EF%BC%89xy%EF%BC%882%EF%BC%89x%2Fy%EF%BC%883%EF%BC%89x%2By%EF%BC%884%EF%BC%89x-y%E4%B8%BA%E4%BB%80%E4%B9%88%3F)
已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值(1)xy(2)x/y(3)x+y(4)x-y为什么?
已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值
(1)xy(2)x/y(3)x+y(4)x-y
为什么?
已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值(1)xy(2)x/y(3)x+y(4)x-y为什么?
抄错题了吧?如果原题是7x^2 + 5y^2=12xy
则7x^2+5y^2-12xy=0
(7x-5y)(x-y)=0
可得x/y=5/7或x/y=1
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
已知7 x^2 + 5y x^2=12xy,并且xy不等于0,则可求出()的值(1)xy(2)x/y(3)x+y(4)x-y为什么?
已知|x-2y|+|5x-7y-2|则,x = y=
已知(x-y)^2+|5x-7y-2|=0,求x,y的值.
已知2x-y=-3,求代数式5(x-3y)-2(x-7y)
已知|5x-y-8|+(7y-x+2)=0则4x+6y
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知x^2y等于3,求2xy(x^5y^2-3x^3y-4x)
已知方程3(X-Y)^2-5X-2=2X-7Y-4.求X-Y的值
已知方程3(X-Y)^2-5X-2=2X-7Y-4.求X-Y的值
已知x+2y=2x+y+1=7x-5,求x和y的值
已知x+2y=2x+y+1=7x-5,求x和y的值
已知:3(x-y)的平方-5x-2=2x-7y-4,求x-y的值
已知x+y-7z=0 x-2y+5z=0(xyz不等于0),求x+2y-z/y-2x+12z
已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2)
已知x^2+y^2-8x+12y+52=0 ,求1/2x-1/x-y(x-y/2x-x^2+y^2)