Description
What are the domain restrictions of a+2/ a^2 - 3a - 18?
A: a ≠ -2, a ≠ 3, a ≠ -6
B: a ≠ 3, a ≠ -6
C: a ≠ 2 , a ≠ -3, a ≠ 6
D: a ≠ -3, a ≠ 6
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Explanation & Answer
a² - 3a - 18 = 0
(a - 6)(a + 3) = 0
a = 6 or a = -3.
So the correct choice is the third one.
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