#Need Help with local minimum and maximum of a function

3 messages · Page 1 of 1 (latest)

daring solstice
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I found the two critical numbers (2,0) but when I plug 2 into the original function I don't get what the answer key says = local maximum at x=2 with value -14.29

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When I plug 0 in I get the right answer though

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Just not 2