通分“1/(x+y)和1/(x-y)”用初二先最简公分母的方法
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/20 04:39:10
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通分“1/(x+y)和1/(x-y)”用初二先最简公分母的方法
通分“1/(x+y)和1/(x-y)”
用初二先最简公分母的方法
通分“1/(x+y)和1/(x-y)”用初二先最简公分母的方法
解
最简公分母为:(x+y)(x-y)
∴1/(x+y)=(x-y)/(x+y)(x-y)
1/(x-y)=(x+y)/(x+y)(x-y)