1. D=m^2-144>0 m>12 U m<-12</p>
2. 5x+1>0 x>-0,2
x-2<0 x<2 ]-0,2;2[</p>
5x+1<0 x<-0,2</p>
x-2>0 x>2
ответ ]-0,2;2[
(3x-1-2x-16)/(x+8)>=0
(x-17)/(x+8)>=0
x>=17
x<-8</p>
x<=17</p>
x>-8
]-8;17]
3.
6x-2x^2>=0
2x(3-x)>=0
x>=0 x<=3</p>
ответ [0;3]
x^2-4x-12>=0
x>=6
x<=-2</p>
ответ x<=-2 U [6;9[ U x>9
16-x^2>=0 [-4;4]
7-5x>=0 x<=1,4</p>
[-4;1.4]