Question 316554: Given the polynomial 3x^2-6x-18 what is the vertex of it's graph Found 2 solutions by Fombitz, josmiceli:Answer by Fombitz(32388) (Show Source):
You can put this solution on YOUR website! Complete the square to convert to vertex form,
where (h,k) is the vertex.
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(1,-21) is the vertex.
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You can put this solution on YOUR website! The vertex is midway between the 2 roots
When the equation is in the form
The formula to find roots is
Midway between the 2 roots is
The x coordinate of the vertex is at
The vertex is at (1,-21)
Here's the plot
