48-12x+24x-6x^2>0
-6x^2+12x+48>0|*(-1)
6x^2-12x-48<0|/6
x^2-2x-8<0
D=36=6^2
x1=2+6/2=4
x2=2-6/2=-2
(4+2x)(12-3x)>0
d=4-4*(-1)*8=36
<span> </span><span>x<span>1</span> = 4, x<span>2</span> = -2 , далее по графику:</span>
xE(-2;4)
Ответ: <u><em>xE(-2;4)</em></u>