Résoudre dans ℝ les équations suivantes :
x3 + x2 + x + 1 = 0.
S = {-1; i; -i}.
S = {1; i; -i}.
S = {-1; 1; -i}.
S = {-1; i; 1}.
x3 + 2x2 - x - 2 = 0.
S = {-1; 1; i}.
S = {-1; 1; -2}.
S = {-1; 1; 2}.
x3 - x2 = 0.
S = {0; 1; -1}.
S = {0; 1; i}.
S = {-1; 0; -i}.
x3 - 3/2 x2 + 3/4 x + -1/8 = 0.
S = {-1; 1; 1/2}.
S = {-1; 1; -1/2}.
S = {-1/2}.
S = {1/2}.
x3 + 3x2 - 3x - 10 = 0.
S = {-2; (-1-√21) /2 ; (-1+√21) /2}.
S = {-1; (-1-√21) /2 ; (-1+√21) /2}.
S = {1; (-1-√21) /2 ; (-1+√21) /2}.
S = {2; (-1-√21) /2 ; (-1+√21) /2}.