In this video lesson, students encounter the quadratic formula and learn that it can be used to solve any quadratic equation. They use the formula and verify that it produces the same solutions as those found using other methods, but can be much more practical for certain equations.

Using the quadratic formula to solve equations requires students to attend carefully to the parameters in the given equations (MP6) and to apply different properties of operations flexibly as they reason symbolically (MP2).

Algebra 1, Episode 23: Unit 7, Lesson 16 | Illustrative Math