Voici la suite de mon devoir

Aire du carré:

(racine(3)+3)² = 3+6 racine(3)+9 = 12 + 6 racine(3) = 6 (2+racine(3)) = 22,39

Aire du rectangle:

rac(2) * (rac(72) + 3 rac(6)) = rac(2) * (3 rac(8) + 3 rac(6))

= rac(2) * (3 * 2 rac(2) + 3 * rac(6))

= rac(2) * 3 (2 rac(2) + rac(6)) = 22,39

Donc A=A'