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Year 9 Interactive Maths - Second Edition


Cube Roots

The cube root of a given number is the number whose cube produces the given number. 


Example 9

Solution:


Cube Root of a Negative Number

From the above, we can infer that:

  • The cube root of a positive number is a positive number.
  • The cube root of a negative number is a negative number.

In general:


Example 10

Solution:


Properties of Cube Roots

Consider the cube roots of numbers greater than 1.


In general:


Consider the cube roots of numbers between 0 and 1.


In general:


Key Terms

cube root, properties of cube roots


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