# What is the formula for squaring a binomial?

${\left(a + b\right)}^{2} = {a}^{2} + 2 a b + {b}^{2}$
Formula for the square of a binomial like (a+b) is derived by solving the multiplication (a+b)*(a+b) which equals to ${\left(a + b\right)}^{2} = {a}^{2} + 2 a b + {b}^{2}$