Answer:
[tex]-12a^{4} + 3a^{3} + 20a^{2} -5a[/tex]
Step-by-step explanation:
[tex](5a-3a^{3} )[/tex] • [tex](4a-1)[/tex]
Let's use FOIL (first, outer, inner, last) to solve this. We'll multiply the terms by one another in that fashion.
[tex]20a^{2} - 5a - 12a^{4} + 3a^{3}[/tex]
Rearrange in decreasing exponents.
[tex]-12a^{4} + 3a^{3} + 20a^{2} -5a[/tex]
