若5x-7xy-6y^2=0,求3x\y的值(要过程)

问题描述:

若5x-7xy-6y^2=0,求3x\y的值(要过程)

5x^2-7xy-6y^2=0
(5x+3y)(x-2y)=0
5x+3y=0
x-2y=0
(1)5x+3y=0
x=-3/5y
3x/y=-9/5
(2)x-2y=0
x=2y
3x/y=6

你好!我又来帮你解题了.若5x^2-7xy-6y^2=0,求3x/y的值.5x^2-7xy-6y^2=0(5x+3y)(x-2y)=05x+3y=0,解得:5x=-3y,x/y=-3/5,x-2y=0,解得:x=2y,x/y=2,所以3x/y=3*(-3/5)=-9/53x/y=3*2=6综上,3x/y的值有两个为:-9/5和6....