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9.2.4.3 Recognize that to solve certain equations, number systems need to be extended from whole numbers to integers, from integers to rational numbers, from rational numbers to real numbers, and from real numbers to complex numbers. In particular, non-real complex numbers are needed to solve some quadratic equations with real coefficients.

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Lesson Objectives: Perform necessary operations with complex numbers. Graphing Absolute value Adding / Subtracting Multiplying Exponents of i Dividing

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Graphing Use the complex plane which is similar to the coordinate plane (x,y) The complex plane uses the vertical axis as the imaginary axis. Graph 3+0i Graph 2i Graph -2+2i

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Guiding Question: What role do complex numbers play in working with quadratic functions? To add or subtract complex numbers- 1. Add real parts together and imaginary parts together 2. If subtraction, distribute the subtraction sign

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