About This Lesson
Sometimes, mathematical expressions, such as sin2 θ − cos2 θ, can look scary to manipulate. But the real skill is in
recognizing that this expression is of the form a2 − b2, and that this pattern came up in Algebra 1 or Algebra 2 as a way
of simplifying an expression by factoring it; the factors are a + b and a − b.
In this module, you will learn and practice the following skills:
- Recognize common structures within an expression
- Use those structures to write equivalent expressions
