Key in equation in factor form y = (x - p) (x - q) or y = -(x - p) (x - q) . Find x and y intercepts, line of symmetry and finally the coordinate of the max or min point.
Find the following: 1. x and y intercepts 2. Find the root(s) 3. Find the solution(s) 4. Equation of line of symmetry. 5. Coordinates of the vertex