Réponse :
bonjour,
a)
A = (2d x 5) + (2d x (-d)) + (3 x 5) + (3 x (-d)) = 10d - 2d² + 15 - 3d = -2d² + 7 d + 15
B = 37 + (d x 7) + (d x (-2d)) -22 = 37 + d7 - 2d² -22 = -2d² + d7 +15
b)
J= - 5t + 7y - 1
K= 8a - 2a +5 = 6a +5
L= 3b + 1 + 2b - 5 = 5b - 4
bon courage!!
