# HSA-SSE.A.2

Use the structure of an expression to identify ways to rewrite it. For example, see $x^4 - y^4$ as $(x^2)^2 - (y^2)^2$, thus recognizing it as a difference of squares that can be factored as $(x^2 - y^2)(x^2 + y^2)$.

## Tasks

Seeing Dots

Equivalent Expressions

Sum of Even and Odd

Animal Populations

Computations with Complex Numbers

A Cubic Identity