192

ա)2x-3=< 0
2x-3=0
2x=3
x=2/3
բ)4x-3>= 0
4x-3=0
4x=3
x=3/4

193

ա)x^2 -12x +32 <=0
x^2-12x+32=0
D=144-128 = 16
x=12-V16 / 2 = 4
x= 12+V16 / 2 = 8
xE[4;8]
բ) x^2 + 8x +12 <=0
x^2 +8x+12=0
D=64 — 48 =16
x = -8-V16/2=-6
x=-8+V16/2= -2
xE[-6;-2]

197

ա)1/x-1>=0
x-1>0
x>1
xE(1;+անվ․)
բ)5/2-x<=0
2-x < 0
-x<-2
x>2
xE(2:+անվ.)