若a＜0,化简|a-3|-根号a²=

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若a＜0,化简|a-3|-根号a²=若a＜0,化简|a-3|-根号a²=若a＜0,化简|a-3|-根号a²=若a＜0,化简|a-3|-根号a²=-(a-3)-(

若a＜0,化简|a-3|-根号a²=
若a＜0,化简|a-3|-根号a²=

若a＜0,化简|a-3|-根号a²=
若a＜0,
化简|a-3|-根号a²
=-(a-3)-(-a)
=-a+3+a
=3