We note that this is a difference of squares, so $513^2 - 487^2 = (513+487)(513-487) = (1000)(26) = \boxed{26000}$.
Question:
What is the value of $513^2 - 487^2$?
Answer:
Let's think step by step.

user
26000
What is the value of $513^2 - 487^2$?
test