When 4x^2 + 7x - 1 is divided by x + 4, what are the quotient and remainder?
I suggest you watch this video: https://www.khanacademy.org/math/algebra-home/alg-polynomials/alg-long-division-of-polynomials/v/dividing-polynomials-1
Dividing polynomials can seem confusing at first, but after a while, you'll see that it is no different from dividing whole numbers!
:)