Löse die folgenden kubischen Gleichungen ax3 + bx2 + cx = 0

-5x3 - 20x2 + 225x = 0
 x1 = 0 ,   x2 = -9 ,   x3 = 5
0.5x3 + 3x2 - 8x = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 2
6x3 + 84x2 + 294x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = -7
-x3 + 7x2 + 18x = 0
 x1 = 0 ,   x2 = -2 ,   x3 = 9
9x3 - 171x2 + 810x = 0
 x1 = 0 ,   x2 = 9 ,   x3 = 10
5x3 + 40x2 = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 0
-4.5x3 - 22.5x2 + 225x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = 5
5.5x3 - 55x2 + 137.5x = 0
 x1 = 0 ,   x2 = 5 ,   x3 = 5
5x3 + 80x2 + 300x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = -6
3.5x3 - 14x2 - 210x = 0
 x1 = 0 ,   x2 = -6 ,   x3 = 10
8.5x3 + 68x2 + 127.5x = 0
 x1 = 0 ,   x2 = -5 ,   x3 = -3
9x3 - 81x2 + 180x = 0
 x1 = 0 ,   x2 = 4 ,   x3 = 5
-x3 - 8x2 = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 0
1.5x3 + 18x2 + 52.5x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = -5
5.5x3 + 60.5x2 + 154x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = -4
4x3 - 76x2 + 360x = 0
 x1 = 0 ,   x2 = 9 ,   x3 = 10
9x3 - 144x2 + 567x = 0
 x1 = 0 ,   x2 = 7 ,   x3 = 9
7.5x3 + 75x2 + 187.5x = 0
 x1 = 0 ,   x2 = -5 ,   x3 = -5
-10x3 + 10x2 + 560x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 8
-1.5x3 - 12x2 + 30x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = 2