There are 3 possible ways of working out the coordinates of the vertex of a quadratic equation. These are:
- Using the Axis of Symmetry formula of the parabola
- Using the roots of the quadratic equation (the x-coordinate of the 2 points where the curve crosses the x-axis)
- Using completing the square
1. Using the Axis of Symmetry of the Parabola
2. Using the Roots of the Quadratic Equation
EXAMPLE I – Using graphs to find the coordinates
EXAMPLE II – Using the quadratic formula to find the coordinates
3. Using Completing the Square
