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= -4p² - 6p² + 3pq + 8pq - 2 - 3
= -10p² + 11pq - 5
b. 12kl - 20m - 5kl - 3mn
= 12kl - 5kl - 20m - 3mn
= 7kl - 23mn
= -4p pangkat 2 - 6p pangkat 2 + 3pq + 8pq - 2 - 3
= -10p pangkat 2 + 11pq - 5
B. 12kl - 20mn - 5kl - 3mn
= 12kl - 5kl - 20mn - 3mn
= 7kl - 23mn