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问题: (6x 2) (5x-8x-6) = ?

(6x+2) (5x-8x-6) = ?

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解答:

解:(6x+2) (5x-8x-6)
=(6x+2) (-3x-6)
=-18x^2-36x-6x-12
=-18x^2-42x-12