2002²-2001×2003 2001²-2010×2012

问题描述:

2002²-2001×2003 2001²-2010×2012

2002²-2001×2003
=2002²-(2002-1)(2002+1)
=2002²-2002²+1
=1
2001²-2010×2012
=2011²-(2011-1)(2011+1)
=2011²-2011²+1
=1