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

7.5x3 + 45x2 = 0
 x1 = 0 ,   x2 = -6 ,   x3 = 0		2.5x3 + 7.5x2 - 100x = 0
 x1 = 0 ,   x2 = -8 ,   x3 = 5
3x3 - 33x2 + 30x = 0
 x1 = 0 ,   x2 = 1 ,   x3 = 10		4.5x3 + 36x2 - 90x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = 2
-6.5x3 + 13x2 + 227.5x = 0
 x1 = 0 ,   x2 = -5 ,   x3 = 7		9x3 - 99x2 + 162x = 0
 x1 = 0 ,   x2 = 2 ,   x3 = 9
5.5x3 + 38.5x2 + 55x = 0
 x1 = 0 ,   x2 = -5 ,   x3 = -2		-7x3 + 14x2 + 441x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 9
6.5x3 - 13x2 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 2		7x3 + 133x2 + 630x = 0
 x1 = 0 ,   x2 = -10 ,   x3 = -9
2x3 + 22x2 + 36x = 0
 x1 = 0 ,   x2 = -9 ,   x3 = -2		-4x3 + 12x2 = 0
 x1 = 0 ,   x2 = 0 ,   x3 = 3
1.5x3 - 4.5x2 - 81x = 0
 x1 = 0 ,   x2 = -6 ,   x3 = 9		-6x3 + 84x2 - 240x = 0
 x1 = 0 ,   x2 = 4 ,   x3 = 10
4.5x3 - 13.5x2 - 81x = 0
 x1 = 0 ,   x2 = -3 ,   x3 = 6		4x3 + 4x2 - 120x = 0
 x1 = 0 ,   x2 = -6 ,   x3 = 5
2x3 - 6x2 - 140x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 10		0.5x3 + x2 - 4x = 0
 x1 = 0 ,   x2 = -4 ,   x3 = 2
4x3 - 68x2 + 288x = 0
 x1 = 0 ,   x2 = 8 ,   x3 = 9		3.5x3 + 17.5x2 - 49x = 0
 x1 = 0 ,   x2 = -7 ,   x3 = 2