Algebra help please

Simplify

I am using parenthesis to separate , if i write the whole prob as is, it runs together


a + 9 (3a - 18)
_____ ________
36 - a^2 (3a + 27)


possible answers i can choose from

1
____
a + 6



1
____
a - 6



- 1
____
a - 6


- 1
___
a + 6

I am thinking it is


- 1
___
a + 6

but I am not for sure.

Ahh lol never mind, I finally figured it out.. Thanks for the help though:)

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asked by Kitty

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