Lesson 8

Multiplying Expressions

These materials, when encountered before Algebra 1, Unit 7, Lesson 8 support success in that lesson.

Lesson Narrative

In this lesson, students use a diagram to multiply factors of the form \((a+b)(c+d)\) and gain fluency by using the diagrams in different ways. In the associated Algebra 1 lesson, students factor quadratic expressions of the form \(x^2 - a^2\). Familiarity with using diagrams to find factors can support students with a more concrete method to approach factoring. Students look for and make use of structure (MP7) when they use diagrams to expand and factor partially filled in diagrams.

Learning Goals

Teacher Facing

  • Recognize that two of the terms from the expanded form of quadratics are opposites.
  • Use a diagram to multiply expressions

Student Facing

  • Let’s explore multiplication strategies.

CCSS Standards

Building Towards