Completing The Square And The Vertex
Overview
Completing the square rewrites a quadratic so that its turning point is visible at a glance. From the rewritten form you can read off the maximum or minimum value and the line of symmetry without any further work.
In this lesson you will find the maximum or minimum value of a quadratic by completing the square, and use it to sketch the graph or find the range for a given domain.
Objectives
- Find the maximum or minimum value of a quadratic function by completing the square or by differentiation.
- Use the maximum or minimum value to sketch the graph of the function or to determine its range for a given domain.
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Mind map
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Flashcards
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Completing The Square And The Vertex. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Complete the square: x^2 - 4x + 1 = A. (x - 2)^2 - 3 B. (x - 2)^2 + 1 C. (x - 4)^2 - 3 D. (x + 2)^2 - 3 Answer: A
- The vertex of y = (x - 2)^2 - 3 is: A. (2, 3) B. (2, -3) C. (-2, -3) D. (-2, 3) Answer: B
- For y = (x - 2)^2 - 3, the minimum value is: A. 2 B. -2 C. -3 D. 3 Answer: C
- In a(x - h)^2 + k, the vertex is a maximum when: A. a > 0 B. a < 0 C. a = 0 D. k > 0 Answer: B
- The line of symmetry of y = (x - 2)^2 - 3 is: A. x = -2 B. x = 2 C. y = -3 D. x = 3 Answer: B
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