-x^2 - 7x - 10 = 0
5x^2 - 7x -6 = 0
3x^2 - 3x - 18 = 0
9x^2 - 24x + 16 = 0
x^2 + 8x + 16 = 0
x = -4
x = 2 x = -3/5
x = -5 x = -2
x = 3 x = -2
x = 4/3
