Need help, I'm stuck on this​

The answer is 729/64.

Step-by-step explanation:

I would first simplify the equation.

In the denominator, you can get rid of b^0 because that just equals 1.

For the a's in the numerator and denominator, you have to flip them so the exponents can be positive.

Equation:  

Now, you can subtract a and a^3.  This would be 1/a^2.

Equation:

Now, you can square the whole equation.

Equation:

This is the simplified equation.  Now you can plug in -2 and -3.

Equation:

Equation:

Equation: 729/64

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(8+64)^2= 5184 < answer

step-by-step explanation:

2^3 = 8

4^3= 64

(8+64)^2 = 5184