Question

simplify
a) (p+q+r)(p-q+r)-p(p+q)​

Answer 1

Answer:

2rp + r² - pq

Step-by-step explanation:

p²- pq + pr + qp - q²+ qr + rp - rq +r² - p² - pq

pr - q² + qr + rp -rq + r² - pq

pr + rp + r² - pq

2rp + r² - pq