Question

Calculati dand factor comun :
a) 2007 x2003 - 2002 x 2007-20067
b) 2010 + 2010 x 2016 - 2017x2009

Answer 1

a) 2007 x2003 - 2002 x 2007-2007 =2007*(2003-2002-1)=
2007*0=0


b) 2010 + 2010 x 2016 - 2017x2009 =2010*(1+2016)-2017*2009=
=2010*2017 -2017*2009= 2017*(2010-2009)=2017*1=2017

Answer 2

2010+2010x20016-2017x2009=2010x(1+2016)-2017x2009=2010x2017-
-2017x2009=2017x(2010-2009)=2017x1=2017

2007x2003-2002x2007-20067=2007x(2003-2002)-20067=2007x1-2067=
=2007-20067=-18060