Factorization 2009 + 2009 ^ 2-2010 ^ 2

Factorization 2009 + 2009 ^ 2-2010 ^ 2

2009+2009²-2010²
=2009-(2010²-2009²)
=2009-(2010-2009)(2010+2009)
=2009-(2010+2009)
=2009-2010-2009
=-2010