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2p2+p2-6pq-2pq-3q2
3p2-8pq-3q2
dibelakang p dan q adlh kuadrat ya
2p² - 6pq + p² - 3pq + pq - 3q² =
2p² + p² - 3q² - 6pq - 3pq + 3pq =
p² - 3q² -8pq