123²-122x124

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/10 17:02:22
123²-122x124123²-122x124123²-122x124123²-122x124=123²-(123-1)(123+1)=123

123²-122x124
123²-122x124

123²-122x124
123²-122x124
=123²-(123-1)(123+1)
=123²-(123²-1)
=123²-123²+1
=1