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x(x+3)+5(x+3)>0
(x+3)(x+5)>0
m.z. x=-5 v x=-3, a=1>0 ramiona paraboli do gory.
_____-5_____-3_____>
+ + 0 _ _ 0 + +
Odp. x∈ (-∞, -5) u (-3, +∞).