f(x) = x2

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Bell Ringer Find the zeros of each function.
4.
f(x) x2 18x 16
5.
f(x) x2 8x 24
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Objectives
Define and use imaginary and complex
numbers. Solve quadratic equations with complex
roots.
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Example 2A Solving a Quadratic Equation with
Imaginary Solutions
Solve the equation.
Take square roots.
Express in terms of i.
Check
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The discriminant is part of the Quadratic Formula
that you can use to determine the number of real
roots of a quadratic equation.
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