Explications étape par étape :
1 vect U = vect AC
vect U 5 vect AC = x - 5
-2 y - 3
vect U = vect AC ⇔ 5 = x - 5
-2 y - 3
⇔ 5 = x - 5 ⇔ x = 10
-2 = y - 3 ⇔ y = 1
C ( 10 ; 1 )
vect U = vect BD
vect U 5 vect BD = x - -2 = x + 2
-2 y - 5 y - 5
vect U = vect BD ⇔ 5 = x + 2
-2 = y - 5
⇔ x = 5 - 2 = 3
y = -2 + 5 = 3
D (3 ; 3 )
