Anyone got the answer or know how to do this? I forgot the formulas.
1 answer:
Step-by-step explanation:
(x - 1)(x + 2) < 18
x^2 + x - 2 < 18
x^2 + x - 20 < 0
(x - 4)(x + 5) < 0
Hence, -5 < x < 4.
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