# How do you simplify p(p-q) + q(q-r) + r(r-p)?

##### 1 Answer
Apr 13, 2015

There isn't much to simplify, but you can get rid of the brackets:

$= {p}^{2} - p q + {q}^{2} - q r + {r}^{2} - p r$

And maybe re-arrange:

${p}^{2} + {q}^{2} + {r}^{2} - p q - p r - q r$

Doesn't look much simpler to me...