Vertex and extremum of a parabola (Vertex x is negative b over two a; extremum value ties to discriminant)
jee-mainjee-advanced
Vertex x is negative b over two a; extremum value ties to discriminant over four a
What each symbol means
| Symbol | What it stands for |
|---|---|
| D | b²−4ac |
| a | Leading coeff |
| b | Linear coeff |
| c | Constant |
When to use this
a≠0; maximum if a<0, minimum if a>0.