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 - (2002²-1²)
=1
2011²-2010×2012
=2011² - (2011-1)(2011+1)
=2011² - (2011²-1²)
=1