化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]

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化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1

化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]

化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
3(-3a²-2a)-[a²-2(5a-4a²+1)-3a]
=-9a²-6a-(a²-10a+8a²-2-3a)
=-9a²-6a-(9a²-13a-2)
=-9a²-6a-9a²+13a+2
=-18a²+7a+2