Answer
$2ab\sqrt 5b$
Work Step by Step
We can simplify the equation as follows:
= $\sqrt 20a^{2}b^{3}$
= $\sqrt 4*\sqrt 5*\sqrt a^{2}*\sqrt b^{3}$
= $2*\sqrt 5*a*\sqrt b^{3}$
= $2*\sqrt 5*a*\sqrt b^{2}*\sqrt b$
= $2*\sqrt 5*a*b*\sqrt b$
= $2ab\sqrt 5b$
