Résolvez les équations suivantes dans ℝ3 :
x + y + z = 2;
x + 2y + z = -2 et
x - y + z = 1.
S = ℝ3.
S = {(-1; -1; 1)}.
S = {(0; 1; 0)}.
S = ∅.
Résolvez les équations suivantes dans ℝ2 :
x + y = 5 et xy = 3.
S = {(1-√13)/2; (5-√13)/2}.
S = {(5-√13)/2 ; (5+√13)/2}.
S = {5/2; -5/2}.
S = {(-5-√13)/2 ; (-5+√13)/2}.
-x + y = 1 et x + y = 0.
S = {(-1/2; -1/2)}.
S = {(-1/2; 1/2)}.
S = {(1/2; 1/2)}.
S = {(1/2; -1/2)}.
10x + y = 3 et x + 2y = 5.
S = {(-1/19; 47/19)}.
S = {(1/19; 47/19)}.
S = {(-1/19; -47/19)}.
S = {(1/19; -47/19)}.
x + y = 1 et x + y = 0.
S = {(0; 1)}.
S = ℝ.
S = {(1; 0)}.
