1.true or false: a parabolas roots refers to how many times it crosses the y-axis.
2. true or false: it is possible for a parabola to have zero roots.
3. true or false: the discriminant is used to determine the number of roots a parabola has.
4.y=x^2+5x+4
A. d = 9 ; 1 solution
B. d = 9 ; 2 solution
C. d = 7 ; 2 solution
D. d = -9 ; no solution