12q^2 -36 q+27
(6q - 9) (2q - 3)
Let us find factors of 12q^2 and 2 and test to find the middle term
12q^2 and 27
12q, q 27,1
9,3
6q, 2q 27,1
9,3
4q, 3q 27,1
9,3
(6q - 9) (2q - 3)
| | | |
| -18q |
\ -18q /
_______
-36q
Therefore the factor of 12q^2 - 36q + 27 is (6q - 9) (2q - 3)