Réponse :
bonjour,
a-
GO = x + 5
RS = 2/6 x = 1/3 x
HE = x - 4.5
AC = 3/8 x
b-
P = 4 × 2.5 + x × 6
P = 6x + 10
c-
Agrand carré = 4 × 4 = 16
Aire 1 petit carré = x × x = x²
A 4 petits carrés = x² × 4 = 4x²
Acroix = Agrand carré - Apetit carré
Acoix = 16 - (x × x )× 4
Acroix = 16 - 4x²
voila:)
