SOLUTION: graph f(x)=-x^2-8x-15 and find the vertex.

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Question 369417: graph f(x)=-x^2-8x-15 and find the vertex.
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=-x^2-8x-15
a=-1, b=-8
x =-b/2a
x=-(-8)/2*(1)
x=-4
...
y = -(4)^2-8*(-4)-15
y=-16+32-15
y=1
...
m.ananth@hotmail.ca