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

3x3 + 21x2 + 18x = 0
 x1 = 0 ,   x2 = -6 ,   x3 = -1		-5.5x3 - 33x2 + 148.5x = 0
 x1 = 0 ,   x2 = -9 ,   x3 = 3
1.5x3 + 24x2 + 90x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = -6		10x3 + 30x2 + 20x = 0
 x1 = 0 ,   x2 = -2 ,   x3 = -1
-3.5x3 - 28x2 - 24.5x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = -1		10x3 + 80x2 = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 0
-9x3 - 117x2 - 378x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = -6		-3.5x3 + 14x2 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 4
5.5x3 + 27.5x2 - 77x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 2		2x3 - 18x2 + 16x = 0
 x1 = 0 ,   x2 = 1 ,   x3 = 8
6x3 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 0		5x3 + 20x2 - 300x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = 6
2.5x3 + 17.5x2 = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 0		10x3 - 40x2 - 210x = 0
 x1 = 0 ,   x2 = -3 ,   x3 = 7
5x3 + 65x2 + 180x = 0
 x1 = 0 ,   x2 = -9 ,   x3 = -4		8.5x3 - 8.5x2 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 1
10x3 + 110x2 + 180x = 0
 x1 = 0 ,   x2 = -9 ,   x3 = -2		2.5x3 - 5x2 - 200x = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 10
4.5x3 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 0		3x3 - 6x2 - 189x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 9