-2 $\sqrt{5}$
You asked:
Evaluate the expression: \(-\left( 2 \sqrt{5} \right)\)
MathBot Answer:
\[-\left( 2 \sqrt{5} \right) = - 2 \sqrt{5} \approx -4.47213595499957939281834733746255\]
\[\begin{aligned}-\left( 2 \sqrt{5} \right)& = - 2 \cdot \sqrt{5}\\& = -2 \cdot \sqrt{5}\end{aligned}\]