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### 9.4 Solving Quadratic Equations by Completing the Square

Standard(s):

• A.REI.4a: Use a method of completing the square to transform any quadratic equation in x into an equation of the form (x-p)^2 = q that has the same solutions. Derive the quadratic formula from this form.
• A.REI.4b.: Solve quadratic equations in one variable. Solve quadratic equations by inspection taking square roots, completing the square, the quadratic formula, and factoring as appropriate to the initial form of the equation.
Essential Question:
• How are quadratic functions used to model, analyze, and interpret mathematical relationships?
• What are the different ways to solve a quadratic equation, and when is each appropriate?
• How can analytic and graphical methods be used to support each other in the solution of a problem?
Learning Target:
• I can solve a quadratic equation by taking square roots.
• I can solve a quadratic equation by completing the square.

Warm-Up:

Notes:

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Video:

Click below for the Classroom Lesson -  9.4 Solving Quadratic Equations by Completing the Square

Watch this video on Solving Quadratic Equations by Completing the Square

Watch this video on Solving Quadratic Equations by Completing the Square

Activities:

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Assessment/Homework:
Day 1:  pg. 555 11-31 odd

Day 2: Worksheet 9.4 A evens & Worksheet 9.4 B evens