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因式分解:x4+y4+z4-2x2y2-2y2z2+2z2x2
人气:145 ℃ 时间:2020-10-01 22:51:18
解答
x4+y4+z4-2x2y2-2y2z2+2z2x2
=(x2-y2)2+2(x2-y2)z2+z4
=(x2-y2+z2)2
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