Question

add
$p(p - q) + q(q - r) + r(r - p)$
​

Answer 1

Step-by-step explanation:

this your answer correct

Answer 2

p(p - q) + q (q - r) + tr (r - p)

p² - pq + q² - qr + r² - pr

p² + q² + r² - pr - pq - qr

hope this will help you