若 x^2-3xy+2y^2,求x+2y/x+y的值
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/27 02:52:22
若x^2-3xy+2y^2,求x+2y/x+y的值若x^2-3xy+2y^2,求x+2y/x+y的值若x^2-3xy+2y^2,求x+2y/x+y的值是x²-3xy+2y²=0吧.
若 x^2-3xy+2y^2,求x+2y/x+y的值
若 x^2-3xy+2y^2,求x+2y/x+y的值
若 x^2-3xy+2y^2,求x+2y/x+y的值
是x²-3xy+2y²=0吧.如果没有x,y≠0的条件,那么：
(x-y)(x-2y)=0
x=y或x=2y
x=y=0时,(x+2y)/(x+y)无意义 (如果原题有x,y≠0的的条件,此步取消)
x,y≠0时：
x=y时,(x+2y)/(x+y)=(3y)/(2y)=3/2
x=2y时,(x+2y)/(x+y)=(4y)/(3y)=4/3
若1/x-1/y=2,求3x-2xy-3y/x-xy-y的值3x-2xy-3y/x-xy-y 不好意思，是3x-2xy-3y/x-2xy-y
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y
若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值
若xy=2（x+y),求 （3x-5xy+3y)÷(-x+3xy-y) 的值
若x-y=4,xy=1,求(-2xy+2x+3y)-(3xy+2y-2x)-(x+4y+xy)的值
若x^2+xy+y=14,y^2+xy+x=28,求x+y
若 x^2-3xy+2y^2,求x+2y/x+y的值
若x+y=4,x^3+y^3=(x+y)(x^2-xy+y^2)z,求x^3+12xy+y^3的值.
若根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x根号x+y-3+绝对值xy+x+y-2=0,求x/y+y/x
若x+y=4,x-y=6,求xy(y^2+y)-y^2(xy+2x)-3xy的值.
若两个正实数x,y满足x^2+2xy-3y^2=0,求x^2+xy+y^2/x^2-xy+y^2
当x-y=2xy时,求4x-3xy-4y/xy
若1/x-1/y=3,求(2x+3xy-2y)/(x-2xy-y)的值
若1/x -1/y =3,求(2x+3xy-2y)/(x-y-2xy)
若1/X—1/Y=2,求3X-2XY-3Y/X-2XY-Y
若1/x-1/y=3,求（2x-3xy-2y)/(x-2xy-y)的值
若x-y-3的绝对值与(xy+2)²互为相反数求5（x-y)-2[xy-(x-y)]-3[2（x-y)-3xy]的值