## College Algebra (11th Edition)

$\frac{1}{2}$
Divide the inside of each radical with one radical over both of them. $\sqrt{\frac{-10}{-40}}$ Simplify. $\sqrt{\frac{-10}{-40}}=\sqrt{\frac{1}{4}}$ Pull the negative inside the radical into an imaginary number outside of the radical. $\sqrt{\frac{1}{4}}=\frac{1}{2}$