bonsoir
G = ( 2 x + 1 + x + 2 ) ( 2 x + 1 - x - 2 )
= ( 3 x + 3 ) ( x - 1 )
= 3 ( x + 1 ) ( x - 1 )
H = ( x + 2 + 3 x + 2 ) ( x + 2 - 3 x - 2 )
= ( 4 x + 4 ) ( - 2 x )
= 4 ( x + 1 ) ( - 2 x )
I = ( 3 x - 1 + 2 x + 3 ) ( 3 x - 1 - 2 x - 3 )
= ( 5 x + 2 ) ( x - 4 )
Fais le dernier, différence de 2 carrés
