Question

Simplify the product.

-9 √28a^2 * 1/3 √63a

Answer 1

Using root rules you can reduce it to:

-126a * sqrt(a)

You get this by first simplifying the roots and then expanding the sqrt(7a) to sqrt(7) * sqrt(a). At this point you have root 7 times itself which obviously equals 7.

Hope this helps!