12345²-12344*12346=

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 18:48:58

12345²-12344*12346=
12345²-12344*12346=

12345²-12344*12346=
12345²-12344*12346=
12345²-(12345-1)*(12345+1)
=12345²-(12345²-1)
=12345²-12345²+1
=1