Which expression is equivalent to 18^2y^5 (3xy)^2for all values for `x` and `y` where the expression is defined?

To simplify the expression, we can apply the power rule, which states that (a^m)^n is equal to a^(m * n).

So, let's simplify the expression step by step:

18^2y^5 = (18^2)(y^5) = 324y^5

Now, let's simplify (3xy)^2 using the power rule:

(3xy)^2 = (3^2)(x^2)(y^2) = 9x^2y^2

Therefore, the expression 18^2y^5 (3xy)^2 is equivalent to:

324y^5 * 9x^2y^2

Finally, we can multiply the coefficients together:

324 * 9 = 2916

And multiply the variables together:

y^5 * y^2 = y^(5 + 2) = y^7

x^2 remains the same.

So, the final expression is:

2916x^2y^7