Algebra is a branch of mathematics that helps represent problems or situations using mathematical expressions. To form a meaningful mathematical expression, variables such as x, y, and z are combined with mathematical operations such as addition, subtraction, multiplication, and division. Algebra is used in all branches of mathematics, including trigonometry, calculus, and coordinate geometry. 2x + 4 = 8 is a simple example of an algebraic expression.


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Algebra deals with symbols and these symbols are linked together using operators. It is more than just a mathematical concept; it is a skill we all use without realizing it. Understanding algebra as a concept is more important than solving equations and finding the correct answer because it applies to all other topics of mathematics that you will learn in the future or have already learned.

What is Algebra? Everything You Need To Know

Algebra is a branch of mathematics that deals with symbols and the arithmetic operations across these symbols. These symbols do not have any fixed values and are called variables. In our real-life problems, we often see certain values changing. But there is a constant need to represent these changing values. Here in algebra, these values are often represented with symbols such as x, y, z, p, or q, and these symbols are called variables. Further, these symbols are manipulated through various arithmetic operations of addition, subtraction, multiplication, and division to find the values.

Branches of Algebra

The use of numerous algebraic expressions reduces the complexity of algebra. Algebra can be divided into several branches based on the use and complexity of the expressions, which are listed below:


  • Pre-algebra

  • Elementary Algebra

  • Abstract Algebra

  • Universal Algebra

1. Pre-algebra

The fundamental methods of representing unknown values as variables aid in creating mathematical expressions. It help in the transformation of real-world problems into algebraic expressions in mathematics. Pre-algebra includes the formation of a mathematical expression of the given problem statement.

2. Elementary Algebra

Elementary algebra is concerned with solving algebraic expressions to arrive at a viable solution. Simple variables such as x and y are represented as equations in elementary algebra. The equations are classified as linear, quadratic, or polynomial based on the degree of the variable. Linear equations have the following formulas: axe + b = c, axe + by + c = 0, and axe + by + cz + d = 0. Based on the degree of the variables, elementary algebra branches out into quadratic equations and polynomials. A quadratic equation's general form is ax2 + bx + c = 0, and a polynomial equation's general form is axn + bxn-1+ cxn-2+.....k = 0.

3. Abstract Algebra

Abstract algebra employs abstract concepts such as groups, rings, and vectors rather than simple mathematical number systems. Rings are a simple level of abstraction discovered by combining the addition and multiplication properties. Abstract algebra relies heavily on group theory and ring theory. Abstract algebra, which uses vector spaces to represent quantities, has numerous applications in computer sciences, physics, and astronomy.

4. Universal Algebra

Universal algebra encompasses all other mathematical forms involving trigonometry, calculus, coordinate geometry, and algebraic expressions. Across these topics, universal algebra studies mathematical expressions rather than algebraic models. All other branches of algebra can be thought of as subsets of universal algebra. Any real-world problem can be classified into a branch of mathematics and solved using abstract algebra.

Topics in Algebra

Algebra is divided into numerous topics to facilitate in-depth study. We have listed some of the most important algebra topics here, including algebraic expressions and equations, sequence and series, exponents, logarithms, and sets.


An equation is a mathematical statement that includes the symbol 'equal to' between two algebraic expressions with equal values. The following are the various types of equations, based on the degree of the variable, to which we apply the algebra concept:

1. Linear equations 

Represent the relationship between variables such as x, y, and z and are expressed in exponents of one degree. We use algebra in these linear equations, beginning with the fundamentals like adding and subtracting algebraic expressions.


2. Quadratic Equations

The standard form of a quadratic equation is ax2 + bx + c = 0, where a, b, and c are constants, and x is the variable. The values of x that satisfy the equation are known as equation solutions, and a quadratic equation has no more than two solutions.

3. Cubic Equations

Cubic equations are algebraic equations that have variables with powers of three. A cubic equation has the generalised form ax3 + bx2 + cx + d = 0. A cubic equation is useful in calculus and three-dimensional geometry (3D Geometry).

Formulas for Algebra

An algebraic identity is an equation that is always true regardless of the variables' values. For all values of the variables, identity means that the left side of the equation is identical to the right side. These formulae use algebraic expression squares and cubes to solve algebraic expressions in a few quick steps. The following are some of the most commonly used algebraic formulas.


  • (a + b)2 = a2 + 2ab + b2

  • (a - b)2 = a2 - 2ab + b2

  • (a + b)(a - b) = a2 - b2

  • (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca

  • (a + b)3 = a3 + 3a2b + 3ab2 + b3

  • (a - b)3 = a3 - 3a2b + 3ab2 - b3

Operations on Algebra

Algebra covers the fundamental operations of addition, subtraction, multiplication, and division.


  • In algebra, two or more expressions are separated by a plus (+) sign for the addition operation.

  • Subtraction: In algebra, the subtraction operation is performed by separating two or more expressions with a minus (-) sign.

  • Multiplication: A multiplication () sign separates two or more expressions in algebra for the multiplication operation.

  • Division: In algebra, two or more expressions are separated by a "/" sign for the division operation.


This is the end of this post about what algebra is, in this post, we mention everything about algebra that you need to know. Here is a quick review of what algebra is: Algebra is a branch of mathematics that deals with symbols and the rules that govern their manipulation. These symbols (now written as Latin and Greek letters) represent quantities with no fixed values, known as variables, in elementary algebra. Equations in algebra describe relationships between variables in the same way that sentences describe relationships between specific words.