Question

A student’s work to simplify a radical is shown below. Select the statement which best applies to the sample mathematical work.

Answer 1

the answer is B

Answer 2

B

Explanation:

`\sqrt[4]{80} =\sqrt[4]{16 \cdot 5}`

`\sqrt[4]{16 \cdot 5} =\sqrt[4]{16} \sqrt[4]{5} =2\sqrt[4]{5}`

The second line is incorrect as
`\sqrt[4]{16} =2`