When all else fails, use the quadratic formula! A video lesson introduces the quadratic formula to scholars and then demonstrates two problems. One problem results in integer solutions, the other in irrational solutions.

Concepts

quadratic equations, quadratic formula, solving quadratics, solving equations

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Additional Tags

math

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Instructional Ideas

• Have pupils sing the Quadratic Formula Song to a familiar melody
  
• Use problems from the practice as whiteboard practice

Classroom Considerations

• Assumes students know how to substitute values into a formula

Pros

• Emphasizes the connection between using the quadratic formula and other methods of solving
• Uses mathematical vocabulary throughout the lesson

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