Question

Question located in picture below:

Answer 1

5a^2+1

Explanation:

Combining like terms in polynomials can go based on the degree it has.

Since 7a^2 and -2a^2 have the same degree as one another, we can just add them, which gives us 5a^2

Now since -4 and 5 dont have any degree, they are liked terms.

Add: -4+5=1

Now when simplified, we get:

5a^2+1

Answer 2

5a^2 + 1

Explanation:

7a^2 - 4 - 2a^2 + 5

5a^2 + 1