5'6 Quadratic Equations and Complex Numbers

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5.6 Quadratic Equations and Complex Numbers
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Essential Question How do you use imaginary
numbers in mathematics? Objectives Classify
and find all roots of a quadratic equation.
Graph and perform operations on complex numbers.
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Rules and Properties Solutions of a Quadratic
Equation
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Find the discriminant, and determine the number
of real solutions.
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Imaginary Numbers
Use the quadratic formula to solve each equation.
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Performing operations with complex numbers
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Conjugates and Absolute Value

• The conjugate of a bi is a bi
• The absolute value of a bi
• is denoted a bi
• and is equal to

Write the conjugate and find the absolute value
of each complex number.
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