Combining radicals similar to combining like terms

In what ways are combining like radical terms similar to combining like terms that are monomials?

Just like combining like terms with the same variables, you combine like 
radicals with the same number under the radical signs.

Example:
3x + 2x 
= 5x   {combined like terms}

3√2 + 2√2
= 5√2   {combined like radicals}

See more combining like terms examples here
                               or
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