一元二次不等式解法练习题目.doc

文档介绍：不等式解法
(1).2x2-5x-12≥0
(2).3x2-5x-2≥0
(3).6x2-13x+5<0
(4).-7x2+19x+6≥0
(5).12x2-13x+3≥0
(6).4x2+24x+27<0
(7).5x²+6x-8<0
(8).2x2+3x+1<0
(9).2y2+y-6<0
(10).6x2-13x+6≥0
(11).3a2-7a-6<0

(12).4n2+4n-15<0
(13).6a2+a-35≥0
(14)..-x2-2x+8≥0
(15).x2+3x-10≥0
(16)5x2-8x-13<0
(17)4x2+15x+9<0
(18)15x2+x-2>0
(19)6y2+19y+10≥0
(20)20-9y-20y2<0
(21).x2-x-20≥0
(22).x2+x-6<0
(31).-2x2-5x+3≥0
(32).6x2+4x-2≥0
(33).x2-2x-3 <0
(34).-x2-6x-8 <0
(35).x2-x-12≥0
(36).x2-7x+10 <0
(37).6x2+x+2≥0
(38).4x2+4x-3≥0
(39).x2-6x-7≥0
(40).x2+6x-7<0
(41).-x2+8x-7≥0
(42).x2+8x+7≥0
(43).-x2+5x-6≥0
(44).x2-5x-6≥0
(45).x2+5x-6<0
(46).x2+5x+6≥0
(47).m²+4m-12<0
(48).6x²-5x-25<0