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

tikz pgf - Flatten an arc while keeping length fixed - TeX - LaTeX Stack Exchange

Just started Trigonometry, its just that 2^2 is 4 and 7^2 is 49, and 49+4 is 53. Since a^2 + b^2 =c^2, i thought that x must equal √53. Why not? : r /maths

Is this wrong or right? : r/askmath

What is the equation for family of parabolas? - Quora

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

ABCs of Geometry “The hardest part of math last week was adding all the decimals on the restaurant menu.” –Student ppt download

Graphing Quadratic Equations in Standard Form Notes for Interactive Notebook

Problem Seems Unsolvable without additional information : r/askmath

What is the equation for the parabola that has its vertex at the origin and has its focus at the point: (0, 10.25)? - Quora

West Side Geometry

What is the definition of a parabola? Can the 'a' value be negative in a parabola equation? If so, what would that look like graphically? - Quora