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OpenStudy (anonymous):
Identify the vertex and axis of symmetry. y=2x^2+16x+31
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OpenStudy (anonymous):
I thought you did -b/2a to find the x coordinate but I am confused as to if that is correct or not
OpenStudy (dumbcow):
that is correct x = -b/2a x = -16/4 = -4 substitute that in for x to get y y = 2(-4)^2 +16(-4) +31 y =-1 vertex: (-4,-1)
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