Tyler Wallace's "Beginning and Intermediate Algebra: Section 5.7: Polynomials - Divide Polynomials"

Read this section. Dividing polynomials is just the same as the long division you learned in elementary school. It is also great practice in solidifying your skills in exponents and multiplication. Pay special attention to how the exponents work as place holders just as the digits in the 1s, 10s, 100s, and so forth, places did for us in elementary school.