The three function are listed below which can be written as:
1. Standard Form: y = ax 2 + bx + c, here a, b, and c are just numbers.
2. Factored Form: y = (ax + c) (bx + d) here also a, b, and c are just numbers.
3. Vertex Form: y = a (x + b) 2 + c, and here also a, b, and c are numbers.