bonsoir
premier champ
largeur = l
longueur = l + 350
aire = l ( l + 350 ) = l² + 350 l
second champ
largeur = 200 m
longueur = l + 350 - 225 = l + 125
aire = 200 ( l + 125 ) = 200 l + 25 000
l² + 350 l = 200 l + 25 000
l² + 350 l - 200 l = 25 000
l² + 150 l - 25 000 = 0
Δ = 150 ² - 4 ( 1 x - 25 000 ) = 22 500 + 100 000 = 122 500 = 350 ²
x 1 = ( - 150 - 350 ) / 2 = - 500 /2 = - 250 non retenu
x 2 = ( - 150 + 350 ) /2 = 100
premier champ = 100 x 450 aire =45 000 m²
second = 200 x 225 aire = 45 000 m ²