|x+1|>3;
x+1>3;
x>2;
-
x+1<-3;
x<-4;
=
|2x+1|<=1;
2x+1<=1;
2x<=0;
x<=0;
-
2x+1>=-1;
2x>=-2;
x>=-1
ОЗ 3(х-2)(х+2)≠0⇒х≠2 и х≠-2
-3(х+2)-(3х²-12)=3(х+2)-(6-х)
-3х-6-3х²+12-3х-6+6-х=0
-3х²-7х+6=0
D=49+4*18=49+72=121 √D=11
x1=(7-11)/-6=2/3
x2=(7+11)/-6=-3
- x^2 + 3x + 1 = 0 /:(-1)
x^2 - 3x - 1 = 0
D = 9 + 4 = 13
x1 = (3 + √13)/2 = 1,5 + √13/2
x2 = (3 - √13)/2 = 1,5 - √13/2