Question

求不等式解集

(1)2x^2-3x-2>0
(2)2x^2-3x-2<0
(3)2x^2-3x+2>0
(4)2x^2-3x+2≤0
(5)x^2-x+1>0
(6)x^2-x+1≤0
(7)x^2-x+1<0
(8)4x^2-4x+1>0
(9)4x^2-4x+1≤0

Answer 1

(1){x|x>2或x<-1/2}
(2){x|-1/2<x<2}
(3）R
（4）空集
（5）R
(6)空集
（7）空集
（8）R
(9){x|X=1/2 }