Question

how do you simplify radical expressions
81 1/4

Answer 1

you mean convert 81^(1/4) into a radical expression?

Answer 2

$81^\frac{1}{4}=\sqrt[4]{81}=\sqrt[4]{3^4}=3\\\\-----------------------\\\\81^\frac{1}{4}=\left(3^4\right)^\frac{1}{4}=3^{4\cdot\frac{1}{4}}=3^1=3$