A3.2

factor polynomial expressions involving common factors, trinomials, and differences of squares [e.g., $2x^2+4x$, $2x-2y+ax-ay$, $x^2-x-6$, $2a^2+11a+5$, $4x^2-25$], using a variety of tools (e.g., concrete materials, computer algebra systems, paper and pencil) and strategies (e.g., patterning);