# Lesson 4

Equations and Their Zeros

These materials, when encountered before Algebra 1, Unit 7, Lesson 4 support success in that lesson.

### Lesson Narrative

In this lesson, students evaluate quadratic functions at their zeros and match other quadratic functions in standard form with equivalent functions in factored form. In the associated Algebra 1 lesson, students explore the zero product property. The work of this lesson familiarizes students with quadratic functions in factored form and begins the work to examine zeros. Students look for and express regularity in repeated reasoning (MP8) when they recognize zeros for a function in factored form.

### Learning Goals

Teacher Facing

- Practice evaluating equations
- Recognize equivalent expressions written in factored, and standard forms
- Recognize that there are 2 solutions to make an equation equal to 0

### Student Facing

- Let’s work with equations in standard and factored forms

### Required Materials

### Required Preparation

Print and cut a copy of the blackline master for the card sort activity for every 2 students.

### CCSS Standards

Building Towards