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2025-02-26 09:11:22
推荐回答(1个)
回答1:

4x^2-4x-15>0
4(x-1/2)^2-16>0
(x-1/2)^2>16/4=4
(x-1/2)^2>4
则x-1/2>4或者x-1/2<-4
x>9/2或 x<-7/2