2005 x 2005 -2004 x 2006
=4020025 -4020024
=1
2005 x 2005 -2004 x 2006
= 4020025 - 4020024
= 1
`2005 xx 2005 -2004 xx 2006`
`= 4020025 - 4020024`
`= 1`
2005 x 2005 -2004 x 2006
= 4020025 - 4020024
= 1
_HT_
`2005 xx 2005 -2004xx 2006
`= 4020025 -4020024`
`= 1`