Question 366631
-2x^2+8x+8
plug x = 0 for y intercept
=8
solve the equation for roots x1,x2
discriminant = 128
...
x1=4.8
x2=-0.8
xintercepts (-0.8,0) (4.8,0)
y intercept = (0,-8)
vertex = (2,-16)
...
{{{graph(500,500,-5,7,-4,20,(-2x^2+8x+8))}}}
...
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