We wrapped up our Trig unit this week with a test, and start talking about polynomials. We learned a number of things regarding polynomials. We learned about different types of polynomials, and identifying coefficients.
A coefficient is a number beside a variable. 
There are four types of polynomials: Monomial, binomial, trinomial, and polynomial.
A monomial will only have one term: 4x, 9y, 12, 2, 1
A binomials will have two terms: 4x-5, 2x+3, 3y-9
A trinomial will have three terms
Polynomials can have four or more terms: x+y+z+2, 2a-b+5c+9