First, let's find factors of 12
now let's do trials (I.e. you try these values until you get the answer as they are the only factors of 12)
2*1 as the product of them must be equal to +2 and sum to -11
\((4x-2)(3x-1)\) Notice this doesn't work why? because if you expand it it is not the same. Now let's try to switch 2 and 1
\((4x-1)(3x-2)\) This works!