解(5a+b)²-2(5a+b)(5a-b)+(5a-b)²

来源：学生作业帮助网编辑：六六作业网时间：2024/05/03 16:45:23

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

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