Question

pq - 3r + pr - 3q

Answer 1

I suppose you want to factor?

Answer 2

yes

Answer 3

(pq-3q)(-3r+pr)

Answer 4

(p - 3)(q + r)
(p - r)(q + 3)
(p + 3)(q - r)

Answer 5

\[pq - 3r + pr - 3q\]
\[=pq-3q-3r+pr\]
\[=q(p-3)+r(p-3)\]
\[=(q+r)(p-3)\]
\[=(p - 3)(q + r)\]