ELI5: Explain Like I'm 5

Square-free polynomial

Okay kiddo, picture a big box full of different shapes like circles, squares, and triangles. Now imagine we take all the square shapes out and put them in their own separate box. This is kind of like what a square-free polynomial is.

In math, we sometimes use letters to stand for numbers. These letters are called variables. So a polynomial is just a bunch of numbers and variables added, subtracted, or multiplied together. But sometimes there are factors that repeat, just like having multiple squares in our shape box. We call these repeating factors "squares" because they have a special relationship to another concept called perfect squares. So by taking those repeating factors out of the polynomial, we get a square-free polynomial.

In conclusion, a square-free polynomial is a math problem where we remove any repeating factors that are like having multiple squares in our shape box.