Answer:
A) a^2 + a
Explanation:
So the problem says "sum" which means you have to add the expressions
(a^2) - 1 and a+1
Work:
((a^2) - 1) + (a + 1)
We can simplify only the constants
(a^2) + a + 1 - 1
(a^2) + a
so the answer is A
Answer: A) + a
add the two equations together to get A.
the ones cancel eachother out and you cant add to a
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