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Miesca zerowe: x∈{-3, -1, 1, 7}
Badamy znaki iloczynu
________-3______-1_____1_____7________>x
+ + + 0 _ _ _ 0 + + 0 _ _ 0 + + +
x∈(-3,-1) u (1,7)
g)
_____1____4/3_____2_____3______>x
_ _ X + + 0 _ _ _ X + + 0 _ _
Odp. x∈(1,4/3> u (2,3>