Determine where a function has a horizontal tangent Question Find all the value(s) of x at which f(x) = + 6x² +36x +9 has a horizontal tangent line. If + 3. there is more than one answer, give all of the x-values separated by commas, e.g. if f(x) has a horizontal tangent line at x = 3 and x = 5 enter 3, 5. Sorry, that's incorrect. Try again? 6,-6 SUBMIT VIEW ANSWER B FEEDBACK Content attribution

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Q: Can i get help step by step

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