How to Solve Quadratic Equations

The function evaluated at $0$ equals $x$.

The function evaluated at $x$ equals $0$.

The points $(0,x)$ lies on the curve of the function.

The points $(x,0)$ lies on the curve of the function.

$x$ is a solution to the equation $f(x)=0$.

$x$ is a solution to the equation $f(0)=x$.