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(3x-2y)2(3x+2y)2(9x2+4y22
人气:167 ℃ 时间:2019-10-19 12:52:48
解答
原式=[(3x-2y)(3x+2y)]2(9x2+4y22
=(9x2-4y22(9x2+4y22
=[(9x2-4y2)(9x2+4y2)]2
=(81x4-16y42
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