(4x-9y)(x-y)=0x=y or 4x=9yx/y=1 or 2.25
解:由原方程可得(x-y)*(4x-9y)=0 (因式分解)解得 x=y或x=(9/4)y所以x/y的值为1或9/4
(4x-9y)(x-y)=0 x=y 4x=9y