Express in simplest radical form. √54

√54 = √(9 * 6) = √9 * √6 = 3√6

Therefore, √54 in simplest radical form is 3√6.

128 in simplest radical form

√128 = √(64 * 2) = √64 * √2 = 8√2

Therefore, √128 in simplest radical form is 8√2.