# Math

## Quadratic Equation

The Quadratic Formula is a well known formula for finding the roots of a parabola described by , with and some real values. By plugging the values of and into the Quadratic Equation , one obtains the values for which the parabola intersects with the x-axis. This is the method for computing the roots of …

## Gradient Descent for solving linear problems

Linear problems like , with the unknown solution, appear in many applications. In theory, one needs to invert matrix such that . When is very small, for example a 3×3 matrix, one can compute the inverse matrix if its determinant is non-zero. When the matrix is large, a direct inversion of the matrix is in …