点M（x,y)在第二象限,且x的绝对值-3=0,y²-4=0,则M的坐标是
人气：478 ℃ 时间：2020-01-30 04:55:45
解答
∵|x|－3＝0
∴|x|＝3
∴x＝±3
∵ y²-4=0
∴y²＝4
∴y＝±2
∵点M（x,y)在第二象限
∴x＜0,y＞0
∴x＝﹣3,y＝2
∴M的坐标是﹙﹣3,2﹚
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