What does rs + 2 mean?

In algebra, when two variables are written next to each other, it implies multiplication. So, $rs$ means $r \times s$.

This means that after multiplying $r$ by $s$, you then add 2 to the result.
Comparing this to the options:
A. Multiply $r$ and $s$ by 2 (Incorrect, this would be $2rs$ or $2(r+s)$)
B. Add $r$ to $s$, then add 2 (Incorrect, this would be $(r+s)+2$)
C. Multiply $r$ by $s$, then add 2 (Correct)
D. Add 2 to $s$, then multiply by $r$ (Incorrect, this would be $r(s+2)$)

The correct option is C. Multiply $r$ by $s$, then add 2.

Like terms have the same variable(s) raised to the same power.
The terms with $p^2$ are $3p^2$ and $2p^2$.
The terms with $p$ are $2p$ and $p$ (which is $1p$).

For the $p^2$ terms:

For the $p$ terms:

Comparing this to the options:
A. $8p^2$ (Incorrect)
B. $8p^6$ (Incorrect)
C. $5p^2 + 3p$ (Correct)
D. $7p^2 + p$ (Incorrect)

The correct option is C. $5p^2 + 3p$.