# Maximum and Minimum Value of Quadratic Functions - The Alternative Method

### The Alternative Method

1. From the calculation above, we find that f(x) is minimum or maximum when $$x = - \frac{b}{{2a}}$$ and we can find the minimum/maximum value of f(x) by substituting $$x = - \frac{b}{{2a}}$$ into the equation.
2. Therefore, the minimum/maximum point of the quadratic function is $$\left( { - \frac{b}{{2a}},f( - \frac{b}{{2a}})} \right)$$

### Suggested Video

Finding the Minimum or Maximum of a Quadratic Function - mbrandl11

Finding the Minimum or Maximum of a Quadratic Function - SPHSLearningLab