Formulas don't appear from thin air! Learn how to derive the quadratic formula by completing the square. As the video instructor demonstrates each step of the derivation, the quadratic formula begins to emerge until it is complete in the final step.

Concepts

quadratic formula, quadratic equations, completing the square, formulas

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Additional Tags

math

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Instructional Ideas

• Have pupils recreate the derivation after watching the video lesson
• Ask individuals solve a quadratic equation by deriving the quadratic formula

Classroom Considerations

• Requires a strong understanding of manipulating algebraic equations with variable coefficients

Pros

• Makes additional lessons available on the same topic
• The instructor explains each step thoroughly

Cons

• None

Common Core

SL.8.2 SL.9-10.2 SL.11-12.2 RST.6-8.7 RST.9-10.7 RST.11-12.7