Year 9 Interactive Maths - Second Edition

Cube Roots

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