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[(3x-1/2y^2)^2+(3x+1/2y^2)^2](18x2-1/2y^4)
人气:187 ℃ 时间:2020-01-12 08:47:43
解答
[(3x-1/2y^2)^2+(3x+1/2y^2)^2](18x2-1/2y^4)
=(18x2+1/2y^4) (18x2-1/2y^4)
=324x^4-1/4y^8
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