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数学
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(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)
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人气:453 ℃ 时间:2020-04-04 12:54:11
解答
(x的四次方+y的四次方-2x²y²)(x的四次方+y的四次方+2x²y²)=(x²-y²)²(x²+y²)²=[(x²-y²)(x²+y²)]²=(x⁴-y⁴)²=x^8-2...
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