已知2x^2-2y^2=3xy,求（x+2y)/(x-y)的值.

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/27 12:44:19
已知2x^2-2y^2=3xy,求（x+2y)/(x-y)的值.
x=n@ole)9@H3BFDCJ*48qfoo{oLj 7ɱ)u@-9Я t7<Q]%"l(P$l7-򤚍w5%!Çy"O*g Pb;*>K.pXcš1qk*aO1q,|mgum/WXԗ'uKGF:&

已知2x^2-2y^2=3xy,求（x+2y)/(x-y)的值.
已知2x^2-2y^2=3xy,求（x+2y)/(x-y)的值.

已知2x^2-2y^2=3xy,求（x+2y)/(x-y)的值.
2x²-3xy-2y²=0
(2x+y)(x-2y)=0
2x+y=0,x-2y=0
所以y=-2x或x=2y
若y=-2x
则原式=(x-4x)/(x+2x)=-3x/3x=-1
若x=2y
则原式=(2y+2y)/(2y-y)=4y/y=4
所以原式=-1或4

2x^2-2y^2=3xy，
2x^2-2y^2-3xy=0
(2x+y)(x-2y)=0
2x+y=0或x-2y=0，x=2y
（x+2y)/(x-y)=0或（x+2y)/(x-y)=4y/y=4

已知:x/y=-2,求x^2-2xy-3y^2/x^-6xy 已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值 已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值. 已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y) 已知x-y=3xy,求2x+3xy-2y/x-2xy-y 已知x-y=3xy,求2x-3xy-2y/x-2xy-y 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值 已知x+y=3xy,求2x+2y-xy/x+y+2xy的值、 已知x-y=4xy,求2x+3xy-2y/x-2xy-y的值 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y 已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值! 已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值 已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值 已知x-y=3xy,求分式3x+2xy-3y/x-2xy-y的值 已知x:y=3:2,求(x²+3xy)/(xy+2xy) 已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y 已知3x=xy+3y,求2x+xy-2y/y-x-xy的值