What is the formula of a square plus b square.

Two terms are represented in two different ways.The sum is written in mathematics.It is an expression and a binomial.The square of sum of them is written in mathematics.

The sum of the two terms is equal to the square of sum.

The square of the sum of two terms is expanded to include both terms and the product of them.

The square of the sum of two terms is simplified as two times the product of them.

Substitute them in the expansion of the formula for evaluating its value.