|a-b+3|+（a-2b）²=0,求b/a的值

|a-b+3|+（a-2b）²=0,求b/a的值
|a-b+3|+（a-2b）²=0,求b/a的值

|a-b+3|+（a-2b）²=0,求b/a的值
|a-b+3|+（a-2b）²=0,则a＝－6,b＝－3,则b/a＝1／2

∵|a-b+3|+（a-2b）²=0；且|a-b+3|≥0；（a-2b）²≥0
∴|a-b+3|=0且（a-2b）²=0
即 a-b+3=0 ① 且 a-2b=0②
①-②b+3=0，b=-3，a=2b=-6
b/a=3/6=1/2