х(х+5)<0</p>
____-5____0___>
........////////.......
(-5, 0)
(х-4)(х+4)>0
_____-4_____4____>
///////............////////
(-беск, - 4),(4, +беск)
_____-5_____3_____>
\\\\\\\...........\\\\\\\
(-беск, - 5), (3, +беск)
х²-3х-4<=0</p>
(х-4)(х+1)<=0</p>
_____-1_____4____>
..........//////////.........
[-1, 4]