Question

Multiply the following $\sqrt{ - 15} \times \sqrt{ - 15}$

Answer 1

Answer: -15

Given:

$\sqrt[]{-15}\times\sqrt[]{-15}$

Since the radical rule states that:

$\begin{gathered} \sqrt[]{a}\sqrt[]{a}=a \\ \Rightarrow\sqrt[]{-15}\times\sqrt[]{-15}=-15 \end{gathered}$

Therefore, the answer is -15.