我们不仅要掌握完全平方公式,还要了解完全平方公式的两个变式a²+b²=(a+b)²-2ab与(a+b)²-(a-b)²=4ab,请利用这两个变式解决以下问题:(1)已知a+b=5,ab=3,求a²+b²的值(2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 21:24:16
![我们不仅要掌握完全平方公式,还要了解完全平方公式的两个变式a²+b²=(a+b)²-2ab与(a+b)²-(a-b)²=4ab,请利用这两个变式解决以下问题:(1)已知a+b=5,ab=3,求a²+b²的值(2](/uploads/image/z/8323627-67-7.jpg?t=%E6%88%91%E4%BB%AC%E4%B8%8D%E4%BB%85%E8%A6%81%E6%8E%8C%E6%8F%A1%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%85%AC%E5%BC%8F%2C%E8%BF%98%E8%A6%81%E4%BA%86%E8%A7%A3%E5%AE%8C%E5%85%A8%E5%B9%B3%E6%96%B9%E5%85%AC%E5%BC%8F%E7%9A%84%E4%B8%A4%E4%B8%AA%E5%8F%98%E5%BC%8Fa%26%23178%3B%2Bb%26%23178%3B%3D%EF%BC%88a%2Bb%29%26%23178%3B-2ab%E4%B8%8E%EF%BC%88a%2Bb%29%26%23178%3B-%EF%BC%88a-b%29%26%23178%3B%3D4ab%2C%E8%AF%B7%E5%88%A9%E7%94%A8%E8%BF%99%E4%B8%A4%E4%B8%AA%E5%8F%98%E5%BC%8F%E8%A7%A3%E5%86%B3%E4%BB%A5%E4%B8%8B%E9%97%AE%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%89%E5%B7%B2%E7%9F%A5a%2Bb%3D5%2Cab%3D3%2C%E6%B1%82a%26%23178%3B%2Bb%26%23178%3B%E7%9A%84%E5%80%BC%EF%BC%882)
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