a=1
x2 + 2x - 3
x = 1 x = -3
2x2 + 3x + 1
x = -1/2
x = -1
x2 - 25
(x+5)(x-5)
x2 - 6x + 8
x = 4
x = 2
6x2 + 11x + 3
x = -3/2
x = -1/3
x2 + 8x + 16
(x+4)2
x2 + 2x - 35
x = -7
x = 5
6x2 - 5x - 4
x = -1/2
x = 4/3
4x2 + 20x + 25
(2x + 5)2