The document discusses how to find the conjugate expression of radical expressions. It defines the conjugate as the expression that allows extracting the terms of a root. For a monomial radical expression, the conjugate has the same index and sub-radical factors, with exponents equal to the index minus the original exponents. For a binomial radical expression with index 2, the conjugate switches the sign between terms. For higher indices, specific product formulas are used to eliminate the radicals when multiplying the expression by its conjugate. Several examples are worked through to demonstrate finding conjugates of monomials, binomials, and expressions with multiple terms under the radical.