(5a-b)(-5a-b)

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 21:42:32
(5a-b)(-5a-b)

(5a-b)(-5a-b)
(5a-b)(-5a-b)

(5a-b)(-5a-b)
(5a-b)(-5a-b) =-(5a-b)(5a+b)=-【(5a)²-b²】=-【25a²-b²】=-25a²+b²=b²-25a²

b²-25a²