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

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.