Résoudre dans ℝ les équations suivantes :
x3 - 2x2 - x + 2 = 0.
S = {-1; 1; 2}.
S = {-1; 1; i}.
S = {-1; 1; -i}.
S = {-1; 1; -2}.
x3 + 6x2 + 12x + 8 = 0.
S = {2}.
S = {-2}.
x3 - x2 + 1/3 x - 1/27 = 0.
S={-1/3}.
S={-1; 1; -1/3}.
S={1/3}.
S={-1; 1; 1/3}.
x3 - 3/2 x2 + 3/4 x + -1/8 = 0.
S = {-1/2}.
S = {-1; 1; -1/2}.
S = {-1; 1; 1/2}.
S = {1/2}.
x3 + x2 + 1/3 x + 1/27 = 0.