Respuesta :

Answer:

The first one is correct

Step-by-step explanation:

a^2-1 + A+1

Since the -1 and +1 cancel out that leaves us with just a^2+a

elizolufowobi997

Answer:

The answer is d

Step-by-step explanation:

[tex]a^{2} -1 + a + 1\\[/tex]

To add variables you count how many variables there are, and in this case, there are two a's

so it is going to be [tex]2a^{2}[/tex]

and 1 - 1 = 0

The answer would be [tex]2a^{2}[/tex]. Thank you