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数学
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(x+2)(3x-2)-5(x+6)(x-6)
人气:413 ℃ 时间:2020-06-03 02:50:54
解答
=(3x²+4x-4)-5(x²-36)
=3x²+4x-4-5x²+180
=-2x²+4x+176
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