Bonjour,
Périmètre 1
(3x+2)*2 + (2x-1) *2 =
6x +4 + 4x -2=
10x +2
P2
(4x-6) *2 + (5x+8)*2=
8x -12 + 10x +16 =
18x +4
Aire 1
(3x+2)(2x-1) =
6x² -3x +4x -2=
6x² +x -2
A2
(4x-6) ( 5x+8) =
20x² +32x -30x -48=
20x² +2x -48
