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(x^2-5)^2+8(5-x^2)+16
人气:189 ℃ 时间:2020-04-23 10:27:06
解答
(x^2-5)^2+8(x^2-5)+16
=(x^2-5+4)^2
=(x^2-1)^2
=(x+1)^2 *(x-1)^2
望采纳.
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