Answer:
12a^2 - 9a + 5
Step-by-step explanation:
(5a^2 - 6a - 4) - (-7a^2 + 3a - 9)
5a^2 + 7a^2 = 12a^2
-6a - 3a = -9a
-4 + 9 = 5
x = -4
Have a Merry Christmas!
Solution:
<u>Note that:</u>
<u>Dividing both sides by 12:</u>
Correct option is A.
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