2008+2007×2009 |
2008×2009−1 |
=
2008+2007×(2008+1) |
2008×(2008+1)−1 |
=
2008+2007×2008+2007 |
2008×2008+2008−1 |
=
2008×2008+2007 |
2008×2008+2007 |
=1.
2008+2007×2009 |
2008×2009−1 |
2008+2007×2009 |
2008×2009−1 |
2008+2007×(2008+1) |
2008×(2008+1)−1 |
2008+2007×2008+2007 |
2008×2008+2008−1 |
2008×2008+2007 |
2008×2008+2007 |