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-3m - 3mn
2. 2a kuadrat +3ab - 7 -5akuadrat + 2ab - 4=
-3 kuadrat2 + 5ab -11
3. 4x kuadart2 - 3xy +7y - 5xkuadrat2 +2 xy - 4y=
x kuadrat2 - xy + 3y
4. -4 kuadrat2 + 3pq - 2 - 6p kuadrat 2 + 8pq - 3=
-10 kuadrat2 +11 pq -5
5. 12kl-20mn-5kl-3mn=
7kl - 23 mn
maaf kl ada yang salah