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OpenStudy (anonymous):
trouble solving (x + 5)(x − 4)(x − 8) ≤ 0 I have found three solutions -5, 4 and 8, but what is the interval then? thanks.
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OpenStudy (anonymous):
cubic polynomial with positive leading coefficient looks like this|dw:1392178242855:dw|
OpenStudy (anonymous):
ok, so it would be something like (-inf, -5] U [-5,4] U [4,8] ?
OpenStudy (anonymous):
the answer is given by the interval for which the curve satisfies <=0 condition. So, the answer will be (-inf,-5] U [4,8]
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