Function quadratic

quadratic(
    a: number,
    b: number,
    c: number,
    form?: "standard" | "vertex",
): ChalkboardFunction
Defines a quadratic function.
Parameters
- a: number
  The leading coefficient
- b: number
  The middle coefficient
- c: number
  The last coefficient (the constant)
- Optionalform: "standard" | "vertex" = "standard"
  The form of the polynomial, which can be "standard" for standard form or "vertex" for vertex form
Returns ChalkboardFunction
Example
```
const parabola = Chalkboard.real.quadratic(1, -3, 2);
const y = Chalkboard.real.val(parabola, 1); // Returns 0
```
- Defined in Chalkboard.real.ts:1427