|a-b+3|+(a-2b)²=0,求b/a的值

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|a-b+3|+(a-2b)²=0,求b/a的值
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|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