Which is the simplified form of the expression
3
2
21 12
x y12
24

the second option is solution

Step-by-step explanation:

exponents inside parentheses get multiplied by exponents outside them

so first:  x^-9y^6 divided by x^12y^18

next, when dividing like terms, keep variable and subtract their exponents

-9 - 12 = -21

6 - 18 = -12

Don't leave negative exponents as answer, simplify by putting them into the denominator (where the exponents will now become positive) with 1 as numerator