**Objective**

To verify the algebraic identity (a-b)² = a² - 2ab + b².

**Algebraic Identity**

- An algebraic identity is an equality, which is true for all values of the variables in the equality.
- The algebraic equations which are valid for all values of variables in them are called algebraic identities.
- In this way, algebraic identities are used in the computation of algebraic expressions and solving different polynomials
- Algebraic identities are also used for the factorization of polynomials.

**Pre-requisite Knowledge**

**Square**

A square is a regular quadrilateral, which means that it has four equal sides and four equal angles of 90 degrees each.

**Area of a Square**

- The product of the length of each side itself.
- Formula: Area = side²

**Rectangle**

Rectangle is a quadrilateral with four right angles and opposite sides are equal. The length of a rectangle is the size of the longer side, whereas the breadth is the size of the shorter side

**Area of a Rectangle**

- The product of its length and breadth
- Formula: Area = length x breadth