x,y均为有理数,且(x-1)2+(y+0.5)的绝对值=0求(y-x)的绝对值.

x,y均为有理数,且(x-1)2+(y+0.5)的绝对值=0求(y-x)的绝对值.
x,y均为有理数,且(x-1)2+(y+0.5)的绝对值=0
求(y-x)的绝对值.

x,y均为有理数,且(x-1)2+(y+0.5)的绝对值=0求(y-x)的绝对值.
依题意可得
x-1=0,y+0.5=0
即x=1,y=-0.5
则|y-x|=|-0.5-1|=1.5