For example, see π‘₯⁴ – 𝑦⁴ as (π‘₯Β²)Β² – (𝑦²)Β², thus recognizing it as a difference of squares that can be factored as (π‘₯Β² – 𝑦²)(π‘₯Β² + 𝑦²).

Standards derived from the same national standard