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**Ingersoll** **3x^2 -4x +1**

The way I understand this is that you multiply 3 and 1 to get 3. I also understand that 3(1) or 1(3) would work by only if they added up to 4 and were able to be multiplied together to make 4 (bx). -3 -1 makes -4. But -3(-1) makes 3. With 3 being the constant I am really struggling to make this thing work.

The book gives the answer as (3x-1)(x-1)

Also: I have a similar problem with 2x^2 +11x -9: -2(9) and 2(-9) don't seem to be working either.

Could be I'm just fried because I'm tired but I'm stumped.