Answer:
if you mean to factor it, it would be, (2x + 3)(2x + 3) but if you do mean the trinomial, that is already the answer.
Explanation:
4x^2 + 12x + 9
you can split 12x into 6x + 6x so now it's
4x^2 + 6x + 6x + 9
then simplify it into:
2(2x + 3) + 3(2x + 3)
then into:
(2x + 3)(2x + 3)