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(x²+y²)(x²-1+y²)-12 因式分解
人气:349 ℃ 时间:2020-06-15 17:11:07
解答
(x²+y²)(x²-1+y²)-12
=(x²+y²)²-(x²+y²)-12
=(x²+y²-4)(x²+y²+3)
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