решите неравенство х*(4х-8)*(х+1)*(12-3х)<0

х(4х-8)*(х+1)*(12-3х)<0(х+1)(12-3х)=х(4х-8)12х-3х2 +12-3х=4х2-8х-4х2+8х+12х-3х2 +12-3х=0-7х2 +17х+12=0-7х2 +17х+12=0\*(-1)7х2-17х-12=0D=b2-4ac=(-17)2 -4*7*(-12)=625X1=- 8/14X2=3