Answer:
To simplify the expression 2√16xy - √16xy + 3√81xy, we can use the distributive property and simplify each term separately.
First, let's simplify the terms involving the square root of 16xy:
2√16xy - √16xy
The square root of 16 is 4, so we can rewrite this as:
2(4√xy) - 1(4√xy)
Simplifying further:
8√xy - 4√xy
Now, let's simplify the term involving the square root of 81xy:
3√81xy
The square root of 81 is 9, so we can rewrite this as:
3(9√xy)
Simplifying further:
27√xy
Now, let's combine the simplified terms:
(8√xy - 4√xy) + 27√xy
The terms 8√xy and -4√xy cancel each other out, leaving us with:
27√xy
Therefore, the simplified expression is 27√xy.
In terms of A and C, we have A = 27 and C = √xy.
So, the simplest radical form of the expression 2√16xy - √16xy + 3√81xy is 27√xy, where A = 27 and C = √xy.