In this unit we learned about polynomials. Polynomials are the sums of multiple terms with different degrees. We can classify them by determining the highest exponent or degree in our expression, along with how many terms there are. For example, a polynomial with a highest exponent of 2 & 3 terms would be a quadratic trinomial. Adding & subtracting polynomials are very similar. In both you combine like terms & simply. The only difference is that when you subtract polynomials, you use the method Keep, Change, Reciprocal (KCR). When multiplying polynomials, we use the FOIL method. This stands for First, Outer, Inner, & Last. The last step is to combine like terms. We can may use polynomials to find the area or perimeter of a specific space.