p (q-3) from q (p-3)
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9
p (q-3)-q (p-3)
pq-3p-pq+3q
-3p+3q
-3 (p-q)
pq-3p-pq+3q
-3p+3q
-3 (p-q)
Answered by
5
q(p-3)-p(q-3)=pq-3q-qp+3p=0
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