This is one way to solve it.
(6-3)^2
breakdown: (6-3) (6-3)
Now using the distributive property you can further solve this problem. This means you multiply everything by each other.
6*6, 6*-3, -3*6, -3*-3
36 -18 -18 +9
Now solve what's above.
You should find 9 as your final answer.
Please vote my answer brainliest. thanks!