Answer:
x^2y^-2
Explanation:
When solving exponential equations, you follow these rules:
- The base of the exponent must be exactly the same. In this example, x^9 and x^-7 have the same bases, as well as y^-12 and y^10.
- When multiplying exponents, you multiply the bases and add the exponents.
In this case, (x^9y^-12)(x^-7y^10) would be x^2y^-2. This is because 9+(-7)=2 and (-12)+10=(-2).
Edit: I apologize for the confusion. I read the equation wrong at first. This edited answer should be correct.