Can someone explain to me why the x-axis of symmetry is always -b/2a : r/askmath

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Geometry Projects PDF, PDF, Sphere

What is the equation for family of parabolas? - Quora

Graphing Quadratic Equations in Standard Form Notes for Interactive Notebook

Optimization problems help : r/askmath

Can you find the equation of a parabola with a focus at its origin? - Quora

What is the equation of a parabola having its vertex on the origin and focus on a line parallel to 3x + 4y = 12? - Quora

Can someone explain why the answer is B and not D? : r/Sat

How does this works. : r/askmath