Question

РЕШИТЕ НЕРАВЕНСТВО
а) (х-5)(4х+1)(х+1)>0
б) (3-х)(4х+1)(3х-3)>0

Answer 1

(x-5)(4x+1)(x+1)>0
------[-1]---------[-1/4]--------[5]-----------
_-_______+________-_______+
$(-1;-1/4) U (5; + infty)$

(3-x)(4x+1)(3x-3)>0
------[-1/4]-----[1]-------[3]------
__+______-_____+_____-
$(- infty; -1/4) U (1;3)$