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OpenStudy (anonymous):
x^2+5x−36 concave up at..?
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OpenStudy (anonymous):
Take a look at this. https://www.google.com/search?q=x%5E2%2B5x%E2%88%9236 And It is either -42 or -36
OpenStudy (anonymous):
Well What are your answers?
OpenStudy (tkhunny):
Have you considered the 2nd Derivative?
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