1. -4p²+3pq-2-6p²+8pq-3 = -4p2 - 6p2 +3pq + 8pq -2-3
= - 8p2 + 11 pq – 5
2. 12kl-20mn-5kl-3mn = 12 kl – 5kl – 20mn – 3mn
= 7kl – 17mn
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1. -4p²+3pq-2-6p²+8pq-3 = -4p2 - 6p2 +3pq + 8pq -2-3
= - 8p2 + 11 pq – 5
2. 12kl-20mn-5kl-3mn = 12 kl – 5kl – 20mn – 3mn
= 7kl – 17mn