The process of multiplying a radical by another radical to get a rational number is called rationalization. Each radical is called the rationalizing factor or conjugate of the other.
Rationalizing of a monomial radical
Example:
Rationalizing of a binomial radical
A binomial radical is the sum or difference of two distinct monomial radicals or rational number and a monomial radical.
Rationalizing the denominator
To rationalize a denominator both the numerator and denominator are multiplied by the rationalizing factor of the denominator.
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