Final answer:
To calculate the second partial derivative with two variables, you need to take the derivative of the first partial derivative with respect to one variable, and then take the derivative of that result with respect to the other variable. This can be done using a calculator by inputting the function and variables and using the appropriate functions or commands.
Step-by-step explanation:
The second partial derivative with two variables can be calculated using the method of taking partial derivatives twice. To calculate the second partial derivative, you need to take the derivative of the first partial derivative with respect to one variable, and then take the derivative of that result with respect to the other variable.
For example, if you have a function f(x, y) and you want to find the second partial derivative with respect to x and y, you would first take the derivative of f(x, y) with respect to x, and then take the derivative of that result with respect to y.
Using a calculator, you can input the function and the variables, and then use the appropriate functions or commands to calculate the first and second partial derivatives.