Completing the Square (Day 3)

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Develop conceptual understanding and procedural fluency with solving quadratics by completing the square.

Prework

• Watch the embedded video above to see how we use formative assessment

Answer Keys

• Link to Answer Keys

Classwork

• Estimation 180 – Day 184 (Andrew Stadel)

• Warm Up

  • Visuals taken from David Wees

• Practice

• Ungraded Formative Assessment / Spiraling

Standards

Common Core

• HSA.REI.B.4.B – Solve quadratic equations by inspection (e.g., for x² = 49), taking square roots, completing the square, the quadratic formula and factoring, as appropriate to the initial form of the equation. Recognize when the quadratic formula gives complex solutions and write them as a ± bi for real numbers a and b.

TEKS

• A.8(A) – solve quadratic equations having real solutions by factoring, taking square roots, completing the square, and applying the quadratic formula