Evaluating Quadratic Functions: Example 9

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.

In this example, we evaluate f(x) = -3x² + 9x - 2 at x = -4. Substituting -4 for x gives: f(-4) = -86. 

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