解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 07:00:53
![解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²](/uploads/image/z/1143966-30-6.jpg?t=%E8%A7%A3%285a%2Bb%29%26%23178%3B-2%285a%2Bb%29%285a-b%29%2B%285a-b%29%26%23178%3B)
解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
=[(5a+b)-(5a-b)]²
=(2b)²
=4b²
用完全平方公式,把(5a+b),(5a-b)看成一个整体
(5a+b)²-2(5a+b)(5a-b)+(5a-b)²
=[(5a+b)-(5a-b)]²
=(2b)²
=4b²
望采纳,O(∩_∩)O谢谢