Evaluating Quadratic Functions: Example 4

Topic

Quadratics

Description

Evaluating a function means determining the output value (y) for a given input value (x). In function notation, we write f(x) to represent the function, and f(a) represents the output value when x = a.

For a quadratic function in standard form f(x) = ax² + bx + c, evaluating the function involves substituting a specific value for x and calculating the result using the given coefficients a, b, and c.

This example evaluates f(x) = -4x² + x - 2 at x = -2. Substituting -2 for x simplifies the process: f(-2) = -20. Be sure to follow the order operations when evaluating a quadratic functions. 

For a complete collection of math examples related to Quadratics click on this link: Math Examples: Quadratics Collection.