What is the following sum?
3b^2(^3 √54a) + 3(^3 √2ab^6)

Step-by-step explanation:

Our original expression is

We will first expand the terms under the cubed roots:

Since we have cubed roots, we are looking for groups of 3 factors.  In the first term, we have three 3's; this means we can bring a 3 out.  In the second term, we have six b's; this means we can bring out 2 b's:

Lastly, combine like terms:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

hope it