Question

Mathematics sat question

Answer 1

Answer:

A) a^2 + a

Step-by-step 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 2

Answer: A) $a^{2}$ + a

add the two equations together to get A.

the ones cancel eachother out and you cant add $a^{2}$ to a