You didn’t finish the question
Nothing further can be done with this x=3a
Answer:
5 is the leading coefficient
23,307,609 that is the answer
You need two terms that multiply to (12x-4). The term on the outside needs to be a common multiple of 12 and 4. The common factors are 1, 2, and 4. Here are the following possible dimensions:
1(12x-4)
2(6x-2)
4(3x-1)
Hope this helps.