5.1.6 The Quadratic Formula (continued)
Example 2 Quadratic Functions with Complex Zeros The Quadratic Formula is used in the following example to find the zeros of a quadratic function when those zeros are complex numbers. Note that the function’s zeros are complex conjugates.
Example 3 Analyzing Quadratic Equations by Using the Discriminant The discriminant b 2 − 4 ac of the quadratic equation ax 2 + bx + c = 0 ( a ≠ 0) can be used to determine its number of real roots.
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