Question

4 Select the correct answer. What is the simplified form of 3sqrt(7) - 5sqrt(7) ? O A - 2sqrt(7) B. 2sqrt(7) c. - sqrt(14) OD. 15sqrt(7)

Answer 1

Given data:

The given expression is,

`3\sqrt[]{7}-5\sqrt[]{7}`

The given expression can be written as,

`\begin{gathered} 3\sqrt[]{7}-5\sqrt[]{7}=\sqrt[]{7}(3-5) \\ =-2\sqrt[]{7} \end{gathered}`

Thus, the option (A) is correct.