What point can be found by taking the average of the endpoints of a line
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y=-2x^2-8x-4
-2x^2-8x=4
divide by negative 2
x^2+4x=-2
complete the square
(x+2)^2=-2+4
(x+2)^2=2
x+2=±
x=-2±
nearest hundreths,
x=-0.59
x=-3.41