Question

How do you divide `2x^4-13x^3+16x^2-9x+20` by `x-5`?

Answer 1

Try this:
What I do is to start to see what term I can find that multiplied by `x-5` gives me `2x^4`; `2x^3` is good because when multiplied by `x-5` gives me `2x^4-10x^3`: