SOLUTION: find the vertex and axis of symmerty of the graph of w(x)=-3x^2-30x+31

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Question 1164128: find the vertex and axis of symmerty of the graph of w(x)=-3x^2-30x+31
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I will show you how to do this in general, and then you can do this problem and any one you encounter like it in the future:

Given:



The -coordinate of the vertex is:



The -coordinate of the vertex is then:



And the equation of the axis of symmetry is:



Bonus fact: The -intercepts, if they exist, are located at:



and the -intercept is located at


John

My calculator said it, I believe it, that settles it