Simplifying rational expressions

Choice A is correct.

Step-by-step explanation:

We have given the expression :

(x⁻⁴y/x⁻⁹y⁵)⁻²

We have to simplify it.

As we know that, a⁻¹ = 1/a

Apply it to the expression we get,

(x⁻⁹y⁵/x⁻⁴y)²

applying  the whole power 2 to the  nominator and the denominator  and the nominator.

(x⁻⁹y⁵)²/(x⁻⁴y)²

ₓ⁻¹⁸y¹⁰/x⁻⁸y²

x⁻¹⁰y⁸

y⁸/x¹⁰ is the simplification.

Choice A is correct.

27 +27 or 27times 2=54

the diffrence is 0