Question

how to simplify y^2+yw+w^2

Answer 1

Depends on how you want it to look..

\[y^2 + yw + w^2\]
\[=y^2 + yw + w^2 + 0\]
\[=y^2 + yw + w^2 + (yw-yw)\]
\[=y^2 + 2yw + w^2 -yw\]
\[=(y+w)^2 - yw\]
Is just one of many possible answers.