(х-7)(х²+7х+49) < -4х+х³+17
х³+7х²+49х-7х²-49х-343 < -4х+х³+17
х³+7х²-7х²+49х-49х+4х-х³ < 17+343
4х < 360
х < 360:4
х < 90
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(х-7)(х²+7х+49) < -4х+х³+17
х³+7х²+49х-7х²-49х-343 < -4х+х³+17
х³+7х²-7х²+49х-49х+4х-х³ < 17+343
4х < 360
х < 360:4
х < 90