Question about Office Equipment & Supplies
The x-coordinate of the vertex is given by
With a=-2, and X_v=8 you have b=-2a*X_v=-2(-2)*8=32
The equation can now be written as y=-2X^2+32X+c
To get c you substitute the value of X_v in the equation above and you set the result equal to Y_v=-4
Solve for c
Posted on Nov 21, 2013
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Posted on Jan 02, 2017
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