First we did a couple more examples from the “Integer Exponents” WebWork:

We introduced polynomials of various degrees:

Polynomials are degree 1 are simply “linear expressions,” i.e., expressions of the form Ax + B; an example from “Linear Expressions” WebWork:

Previewing how we will solve quadratic equations using the quadratic formula:

We looked at the graph of the quadratic polynomial above in Desmos, and noted how the solutions of the corresponding quadratic equation give the x-intercepts of the parabola. See:

Multiplying polynomials–in particular, using “FOIL” to multiply two (linear) “binomial” expressions:

Another example from “Multiply Polynomials”: