Solution
we have given that
$$3x^2 - 5x - 8 < 0$$,
now factorize the equation we get
$$3x^2 - 8x + 3x - 8 < 0$$
$$3x^2 + 3x - 8x - 8 < 0$$
so we get
(x + 1) (3x - 8) < 0
x = (-1 , 8\3) answer
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