计算(a+b)²-(a-b)²的结果.
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/27 10:43:26
![计算(a+b)²-(a-b)²的结果.](/uploads/image/z/1016772-60-2.jpg?t=%E8%AE%A1%E7%AE%97%28a%2Bb%29%26%23178%3B-%28a-b%29%26%23178%3B%E7%9A%84%E7%BB%93%E6%9E%9C.)
x){nu54Ք
-u5uaZl="}ِf2U`9h6X<(ȃDA|C$
7J<( 6IL/.H̳ S
计算(a+b)²-(a-b)²的结果.
计算(a+b)²-(a-b)²的结果.
计算(a+b)²-(a-b)²的结果.
(a+b)²-(a-b)²
=[(a+b)+(a-b)][(a+b)-(a-b)]
=(a+b+a-b)(a+b-a+b)
=2a·2b
=4ab