What does an identity mean in math?
What does an identity mean in math? In mathematics, an identity is an equality relating one mathematical expression A to another mathematical expression B, such that A and B (which might contain some variables) produce the same value for all values of the variables within a certain range of validity. What is an example of identity in math? Polynomial identities are equations that are true for all possible values of the variable. For example, x²+2x+1=(x+1)² is an identity. This introduction video gives more examples of identities and discusses how we prove an equation is an identity. What are the 4...