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Find the vertex of the graph of the equation y = -2x^2+8x-15 + 4x - 8.

 Jan 28, 2022
 #1
avatar+2432 
-1

 

This is what the parabola looks like when graphed (sorry for bad image quality), with a vertext at \(\color {red} 3, -5\)

 Jan 28, 2022
 #2
avatar+298 
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y=-2x^2+12x-23

a=-2 b=12 c=-23

Use formula -b/2a: -12/-4=3

x=3

Plug in 3 as x: y=-2(3)^2+12(3)-23

y=-5

(3,-5)

 Jan 28, 2022

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