P²+3Pq+6-8P²+Pq

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P²+3Pq+6-8P²+Pq

P²+3Pq+6-8P²+Pq
P²+3Pq+6-8P²+Pq

P²+3Pq+6-8P²+Pq
解
p²+3qp+6-8p²+pq
=(p²-8p²)+(3pq+pq)+6
=-7p²+4pq+6