Intermediate Algebra – Student Workbook – Second Edition 2013

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$Lesson 2a – Assessment - Scottsdale Community College - Math Blog$

Lesson 5a - Introduction to Quadratic Functions Mini-Lesson Problem 8 MEDIA EXAMPLE – FINDING X-INTERCEPTS OF A QUADRATIC FUNCTION Given the Quadratic Function f(x) = -3x 2 - 2x, find the x-intercepts and plot/label them on the graph. Round to 2 decimals. Problem 9 YOU TRY – FINDING X-INTERCEPTS OF A QUADRATIC FUNCTION Given the Quadratic Function f(x) = 2x 2 - 5, find the x-intercepts and plot/label them on the graph. Round your values to two decimals. Scottsdale Community College Page 190 Intermediate Algebra
Lesson 5a - Introduction to Quadratic Functions Mini-Lesson Solve Quadratic Equations Graphically A quadratic equation of the form ax 2 +bx+c = d can be solved in the following way using your graphing calculator: 1. Go to Y= 2. Let Y1= ax 2 +bx+c 3. Let Y2 = d 4. Graph the two equations. You may need to adjust your window to be sure the intersection(s) is/are visible. 5. For each intersection, use 2 nd >Calc>Intersect. Follow on-screen directions to designate each graph then determine intersection (hitting Enter each time). 6. Solution(s) to the equation are the intersecting x-values NOTE: The Intersection method will provide us only with approximate solutions to a quadratic equation when decimal solutions are obtained. To find EXACT solution values, you will need to use the Quadratic Formula. This will be covered in the next lesson. Problem 10 WORKED EXAMPLE – SOLVE QUADRATIC EQUATIONS GRAPHICALLY Solve the equation -3x 2 - 2x – 4 = -5 by graphing. There are two intersections. Follow the process above to find the intersections (-1, -5) and (0.33, -5). Solutions to the equation are x = -1 and x = 0.33. Scottsdale Community College Page 191 Intermediate Algebra
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Scottsdale Community College Interm
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Table of Contents Lesson 1a - Intro
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Lesson 1a - Introduction to Functio
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Lesson 1b - Linear Equations In the
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Lesson 1b - Linear Equations Mini-L
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Lesson 2b - Functions and Function
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Lesson 6a - Exponents and Rational
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Lesson 6b - Rational Exponents & Ra
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Lesson 6b - Rational Exponents and
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Appendix A: You Try Answers Lesson
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Appendix A: You Try Answers You Try
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Intermediate Algebra – Student Workbook – Second Edition 2013

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