Year 8 Interactive Maths - Second Edition

Index Laws

Index Law for Multiplication

We know that:

In general:

This formula tells us that when multiplying powers with the same base, add the indices.
This is the first index law and is known as the Index Law for Multiplication.

Example 7

Solution:

Note:

Multiply the numerical coefficients first, and then apply the index law.

Key Terms

index law for multiplication