х²-3х-4<0
х²+х-4х<0
х×(х+1)-4(х+1)
(х+1)×(х-4)<0
Х пр.жит [-1;4]
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х²-3х-4<0
х²+х-4х<0
х×(х+1)-4(х+1)
(х+1)×(х-4)<0
Х пр.жит [-1;4]