Quadratic Formula

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Develop procedural fluency with the quadratic formula.

Answer Keys

• Link to Answer Keys

Classwork

• Estimation 180 – Day 185 (Andrew Stadel)

• Warm Up

• Sample Solutions (New Visions)

• Notes

• Practice / 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