tag:blogger.com,1999:blog-33369353.post8058922813627805959..comments2011-11-30T20:46:31.454+01:00Comments on Le Blog mathématique d'ABC Maths: Pour les élèves de seconde.Guy Marionhttp://www.blogger.com/profile/17982657931628932547noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-33369353.post-84777183845076947902011-11-30T20:46:31.454+01:002011-11-30T20:46:31.454+01:002011^2 - (2011-1)*(2011+1)
= 2011^2 - (2011^2 - 1^...2011^2 - (2011-1)*(2011+1)<br />= 2011^2 - (2011^2 - 1^2)<br />= 1Alain M.http://www.blogger.com/profile/02333206826335627271noreply@blogger.com