Answer:
3x² + 12x + 19
Step-by-step explanation:
I'm assuming this is a multiple choice question and you just didn't provide the choices so I will just simplify and hope for the best.
(x+2)(x+2) = x² + 2x + 2x + 4
3(x² + 4x + 4) + 7
3x² + 12x + 12 + 7
3x² + 12x + 19
