# How do you simplify (3sqrtx^3)(4 2sqrt(xy))?

Jul 30, 2016

$126 x \sqrt{y}$

#### Explanation:

When multiplying or dividing with roots, we can combine them into a single root.

$\left(3 {\sqrt{x}}^{3}\right) \left(42 \sqrt{x y}\right) = 126 \sqrt{{x}^{4} y}$

=$126 x \sqrt{y}$