For this case we must simplify the following expression:

So, if we apply distributive property to the terms within parentheses we have:

We simplify taking into account that:
- Equal signs are added and the same sign is placed.
- Different signs are subtracted and the major sign is placed.

Answer:

(2-a)^2 + 3(2-a)
A^2 -2a + 4 + 6 -3a
A^2 -5a +10