Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Quadratic Functions

9-12

30 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-84 Plus C Silver Edition
• TI-84 Plus CE
• ##### Software

TI Connect™
TI Connect™ CE

• ##### Accessories

TI Connectivity Cable

## Factoring Special Cases

#### Activity Overview

Given a set of shapes whose combined areas represent the left-hand expression, students manipulate them to create rectangles whose areas are equal to the right-hand expression.

#### Key Steps

• In Problem 1, students factor a perfect square trinomial. They find the areas of each of the four figures and arrange the figures to form a square.

Make sure all student calculators have Cabri™ Jr. installed.

• In Problem 2, students prove the rule for factoring a difference of squares.

Students will manipulate the squares to show removing the smaller from the larger.

• Students next transform the L-shape that remains into a long rectangle with the same area. They then compare the areas.