Question

match the following key terms to their definitions.
the number or expression inside a radical sign. choose
the small number written just outside and above the radical sign indicating which root is taken. choose
an expression that contains a root, such as a square root, cube root, or higher-order root. choose
options for each choose: radical expression, radicand, index

Explanation:

First Term - "The number or expression inside a radical sign."

The term "Radicand" is defined as the number or expression inside a radical sign. For example, in $\sqrt{x + 2}$, $x + 2$ is the radicand.

The "Index" is the small number (like the 3 in $\sqrt[3]{y}$) outside and above the radical sign that shows which root (cube root here) is being taken.

A "Radical Expression" is an expression that has a radical (root) in it. For example, $\sqrt{5}$, $\sqrt[4]{x^3}$ are radical expressions.

Answer:

Radicand

Second Term - "The small number written just outside and above the radical sign indicating which root is taken."