Cubic identity 2

About the activity

Objective

To verify [math](a-b)^3 = a^3-3a^2b+3ab^2-b^3 [/math] using unit cubes

Get ready with

27 Unit cubes

What is a unit cube?

A unit cube is nothing but a cube all of whose sides are 1 unit long as shown below. 

This is a unit cube

1. We say its dimension is 1 X 1 X 1.
2. The volume of a 3-dimensional unit cube is 1 cubic unit.
3. By joining unit cubes we can form cubes and cuboids of varied dimension.

Read more about using unit cubes [1]

Instructions for the activity

Download the attached file File:Cubesactivity2.pdf

Task for you

By taking different values of a and b, verify the result.

Explore more

1. Cubic identity 1
2. Cubic identity 3
3. Cubic identity 4

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