How to find the square of the binomial in Python

To calculate the square of a binomial in the Python language, you can use the expand() function of the Sympy library

expand(x)

The parameter x is an algebraic expression to be calculated, a binomial (a + b) raised to the power 2.

$$ ( a + b )^2 $$

The expand() function calculates the power of the binomial.

Note. The expand() function is located in an external module. So, to use it, you need to import it into your script using the import or from import statement.

Example

To calculate the square of the binomial

$$ (x-1)^2 $$

You must define x as a symbol using the Symbol() function before defining the algebraic expression.

To calculate the square of the binomial use the function expand()

from sympy import Symbol, expand
x=Symbol('x')
e=(x-1)**2
expand(e)

The output result is the following:

x**2 - 2*x + 1

The output expression is equivalent to the algebraic result

$$ x^2 - 2x + 1 $$