Question

What is the factorization of the trinomial below

3x^2+36x+81

Answer 1

Divide by 3.
list the things that you add to make 12. and multiply them
these
1,11 .    11
2,10 .      20
3, 9 .       this is 27, so you can stop here.
so, the answer is 3((x+3)(x+9))