Question

How do you simplify `(25a^4 + 19a^2 - a - 78)/(5a^2 + 6a - 9)`?

Answer 1

It is `((5a-6)(5a^3+6a^2+11a+13))/(5a^2+6a-9)`

Explanation:

Expanding

`(5a-6)(5a^3+6a^2+11a+13)`

we get

`25a^4+19a^2-a-78`