(1)若2|x24|+3(2y-1)²=0,则x-y=___?（2）若x²=16,2|y|=4,且xy＞0则x-y=___?
问题描述：
(1)若2|x24|+3(2y-1)²=0,则x-y=___?（2）若x²=16,2|y|=4,且xy＞0则x-y=___?
答
(1) x+24=0,x=24
2y-1=0,y=0.5
x-y=23.5
(2) |x|=4,|y|=2
xy>0
(21) x=4,y=2,x-y=2
(22) x=-4,y=-2,x-y=-2