SOLUTION: how would you compare the value of -b/2a to the vertex of each parabola?

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Question 405071: how would you compare the value of -b/2a to the vertex of each parabola?
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
the line x+=+-b%2F2a is the axis of symmetry and goes through vertex

coordinates of the vertex are ( -b/2a, f( -b/2a))