What is a show work calculator?

A show work calculator, commonly referred to as a step-by-step calculator, is a digital calculator that shows its user every step made to arrive at the result of its input. Wolfram Alpha's step-by-step calculator solves quadratic equations, algebra problems and graphs in this manner.

Wolfram Alpha uses heuristics combined with basic algorithms to determine the most efficient way to solve a mathematical problem and show the steps used to arrive at its conclusion. The company explains that this service is ideal for helping individuals learn basic mathematics, check their work or receive insight on different ways to solve mathematical problems.