Question 442327
It may be beneficial to notice that both "end terms" are perfect squares.

{{{9t^2  = (3t)^2}}}
{{{4 = 2^2}}}

So I will venture a guess and say that this function simplifies to (3t+2)^2. Let's foil and make sure.

(3t+2)(3t+2)  = 9t^2 + 6t + 6t +4 = 9t^2 +12t +4. Check.

{{{(3t+2)^2}}} it is.