Discriminants
By J Epstein
For each quadratic equation, use the discriminant to determine the number and type of roots.
y = x² + 6x + 9
y = 3x² + 4x
y = x2 + 3x +5
y = 2x2 + 9x + 5
y = 5x2 + 10x + 5
y = 5x² + 7x + 9
y = 7x² +12x + 4
y = 2x² + 9x + 7
y = 3x² +8x +5/3
y = 8x² +10x +2
y = 5x² +6x +7
y = x² +10x + 2