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13问答网 > 帮忙解决一道小学数学题，分子是怎么变过来的，过程要详细？

帮忙解决一道小学数学题，分子是怎么变过来的，过程要详细？

2025-03-15 10:52:02

推荐回答（5个）

回答1：

请参考图片，希望能帮到你哈

回答2：

直接相乘，平方差公式：（a-b）（a+b）=a²-b²
1+x-1=x

回答3：

实际上就是这个公式：（a+b）*(a-b)=a^2 - b^2
也可以说是“有理化”的套路

回答4：

。。。。。。。

回答5：

请给图片，不知道哪道题

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