## anonymous 3 years ago find the vertex of y=x^2+16x+64

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1. anonymous

Use the equation to find the axis of symmetry. $x=\frac{ -b }{ 2a }$

2. Goten77

i would do 1st derivative test

3. anonymous

Once you've done that, substitute the x-value into the equation to find y.

4. anonymous

okayyyy thanks guysss

5. anonymous

Yeah 1st derivative test to find the vertex. very smart....not. I don't think a question like this would require such thing.

6. Goten77

isnt the vertex just where the graph goes from increasing to decreasing.... or decreasing to increasing?

7. Goten77

so ye its minimum or maximum

8. anonymous

@Goten77 Stop waffling around.

9. anonymous

All you need for this question is finding the axis of symmetry and then subbing that value into the equation to find y.

10. anonymous

You're overcomplicating a simple question.

11. Goten77

either way takes a short time... but if he showed his teacher the calculus way... ied give him extra credit XDDDDDDDDDDD