bonsoir
valeurs possibles pour x ] 0 ; 8 [
longueur DG = 8 - x et largeur = x
aire = x ( 8 - x ) = 8 x - x²
f ( 0)= 0
f ( 1) = 8 - 1 ² = 8 - 1 = 7
f ( 2) = 16 - 4 = 12
f ( 3 ) =24 - 9 = 15
f ( 4 ) = 32 - 16 = 16
f ( 5) = 40 - 25 = 15
f (6) = 48 - 36 = 12