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(5x+3)(5x-3)(25x^2-9)
题目详情
(5x+3)(5x-3)(25x^2-9)
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答案和解析
(5x+3)(5x-3)(25x^2-9)
=(25x²-9)(25x²-9)
=625x的4次方-450x²+81
=(25x²-9)(25x²-9)
=625x的4次方-450x²+81
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