1.(2x -5 )^2 <9
(2x-5)²-9<0
(2x-5+3)(2x-5-3)<0
(2x-2)(2x-8)<0
1<x<4
2.-3x^2 -4x +7 <0
3x²+4x-7>0
(3x+7)(x-1)>0
x<-7/3或x>1
解不等式:1.(2x -5 )^2
解不等式:1.(2x -5 )^2
其他人氣:577 ℃時間:2020-09-21 14:23:24
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