Réponses

2013-02-13T18:06:36+01:00
A=9n^2 + 6n+1+16n^2 -26n+3 A=25n^2-20n+4 A=(5n-2)^2
2013-02-13T18:13:11+01:00

A=9n*2 + 6n+1+16n*2 -26n+3

A=25n*2-20n+4 A=(5n-2)*2