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= -4p²-6p²+3pq+8pq-2-3
=-10p²+11pq-5
B.
=12kl-5kl-20mn-3mn
=7kl-23mn
C.=-12k²l-9kl²-18k²l-8kl²
=-6k²l-17kl²
D.
⇒ -10p² + 11pq - 5
b. 12kl - 20mn - 5kl- 3mn
⇒ 7kl - 23mn
c. -3(4k²l + 3kl²) + 2(-9k²l- 4kl²)
⇒ - 12k²l - 9kl² - 18k²l - 8kl²
⇒ - 30k²l - 17kl²
d. 5(3m - 5m² + m)- 2(m³ +4m² -9m)
⇒15m -25m²+5m - 2m³ - 8m² +18m
⇒-2m³-33m²+38m