## Reflection: Connection to Prior Knowledge Solving Quadratic Functions Using the Quadratic Formula - Section 1: Warm Up

I think it is important to help students see the connection between deriving the Quadratic Formula by completing the square.  By using students' prior knowledge of completing the square, it is amazing to some students how the Quadratic Formula is formed.  Below is a video from Khan Academy modeling the proof:

Importance of Deriving the Quadratic Formula by Completing the Square
Connection to Prior Knowledge: Importance of Deriving the Quadratic Formula by Completing the Square

Lesson 8 of 10

## Big Idea: To be able to consistently get the correct solution(s) using the Quadratic Formula on Quadratic Equations or Applications through Practice and Verification.

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Standards:
Subject(s):
roots (Algebra), Math, quadratic formula, Quadratic Equations, x-intercepts, solution, Profit Problem, Collaborative Activity, calculator
50 minutes

### Rhonda Leichliter

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