Question

Oblicz pierwiastki wielomianu W(x) = 3x3 + x2 - 12x -4

Answer 1

3x3 + x2 - 12x - 4 = 0 x2 (3x +1) - 4 (3x+ 1) = 0 (3x +1) (x2 - 4) = 0 3x +1 = 0 lub x2 - 4 = 0 3x = -1 lub (x - 2) (x + 2) x = -1/3 x - 2 = 0 lub x + 2 = 0 x = 2 x = -2 x należy {-2;-1/3;2}