Which of the quadratic equations below have two SOLUTIONS? Check ALL that apply.
a) y= x^2 - 8x -20
b) y = x^2 +3
c) y= -x^2 + 2x +1
d) y= x^2 -25
e) y = 4x^2 + 12x +9
f) y = 2x^2 -5x -4
a) y= x^2 - 8x -20
e) y = 4x^2 + 12x +9
f) y = 2x^2 -5x -4