# Algebra

## Quadratic equations. The discriminant

If we have quadratic equation $ax^2+bx+c=0$, then the discriminant of the quadratic equation is the number D and it is found by formula.

Continue reading · 2020-11-29

## Basic properties of logarithms

The logarithm of a given number b is the exponent to which another fixed number, the base a, must be raised, to produce that number b $(a>0, \ a\neq 1, \ b>0)$.

Continue reading · 2020-11-28

## Short multiplication formulas [Polynomial identities]

Square of sum and difference, difference of squares, cube of sum and difference, sum and difference of cubes formulas.

Continue reading · 2020-11-28

## Removing irrationality from the fractions

In this article we will teach you how to remove irrationality from the fractions.

Continue reading · 2019-03-02

## All categories

## New content

- Circle: arc, sector and segment (Geometry)
- Circle: radius, diameter, circumference and area (Geometry)
- The law of cosines and examples (Geometry)
- The law of sines and examples (Geometry)
- Rewriting radicals into exponential form (Algebra)
- Infinite geometric sequence sum formula and examples (Algebra)
- Geometric sequence formulas and examples (Algebra)
- Arithmetic sequence formulas and examples (Algebra)