X+4<SQRT(-X^2-8X-12)
X^2+16+8X<-X^2-8X-12
2X^2+16X+28<0
X^2+8X+14<0
-4+-SQRT(2)
(-4-SQRT(2);-4+SQRT(2))
X+4>=0
X>=-4
(-4;SQRT(2)-4)
X^2+8X+12<=0
(-6;-2)
X=-3
-27+9=-18
X+4<SQRT(-X^2-8X-12)
X^2+16+8X<-X^2-8X-12
2X^2+16X+28<0
X^2+8X+14<0
-4+-SQRT(2)
(-4-SQRT(2);-4+SQRT(2))
X+4>=0
X>=-4
(-4;SQRT(2)-4)
X^2+8X+12<=0
(-6;-2)
(-4;SQRT(2)-4)
X=-3
-27+9=-18