x^2+2005x+7=0
m,n是以上方程的两个解
m^2+2005m+7=0
n^2+2005n+7=0
(m2+2004m+6)(n2+2006n+8)
=(m^2+2005m+7-m-1)(n^2+2005n+7+n+1)
=(-m-1)(n+1)
=-(m+1)(n+1)
=-(mn+m+n+1)
=-(7-2005+1)
=1997
x^2+2005x+7=0
m,n是以上方程的两个解
m^2+2005m+7=0
n^2+2005n+7=0
(m2+2004m+6)(n2+2006n+8)
=(m^2+2005m+7-m-1)(n^2+2005n+7+n+1)
=(-m-1)(n+1)
=-(m+1)(n+1)
=-(mn+m+n+1)
=-(7-2005+1)
=1997