Question 879046

I have to find the maximum or minimum value of each quadratic relation

y= -2x^2 + 12x


y= -3x^2 -21x - 18
<pre>
Determine x-coordinate of the vertex, or h, using: {{{h = - b/2a}}}
y-coordinate of vertex: {{{k = f(h)}}}
Then find the y-coordinate of the vertex, which will be a MAXIMUM for both equations. 

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