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Let’s take –2

 

 Cube of –2 = (–2) 3

= –2 × –2 × –2

= –2 × 2 × 2

= –8

 

So, cube of negative numbers is negative,

and cube of positive numbers is positive

 

Note:

This is different from squares.

Square of a number is always positive

But Cube of a number can be negative

  1. Chapter 7 Class 8 Cubes and Cube Roots
  2. Concept wise

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.