Explanation

Rationalization is the process of removing irrational numbers from the denominator of a fraction.

Why?

• Makes expressions easier to work with

• Often required in exact calculations

Example:
1 / √2 → multiply numerator and denominator by √2 → √2 / 2

Key points:

• Multiply by the same surd in numerator and denominator

• Works for single term denominators and sometimes binomials