b-2a+3c
1) Let's evaluate that polynomial division:
[tex]4ab-8a^2+12ac\colon\text{ 4a}[/tex]2) We can rewrite it as, and then simplify it:
[tex]\begin{gathered} \frac{4ab}{4a}-\frac{8a^2}{4a}+\frac{12ac}{4a} \\ b-2a\text{ +3c} \end{gathered}[/tex]3) So the result of it is b-2a+3c