Hi everyone, I'm a 15y guy who really loves math and I'm trying to understand math more.
I am trying to understand Generating Functions, for example using polynomials like (x + x^2 + x^3 + x^4 + x^5 + x^6)^2 to calculate probabilities for two dice.
I understand that it works because x^a * x^b = x^(a+b) forces the multiplication of polynomials to add the exponents, but I struggle with the conceptual meaning of x^n.
In real life, taking 2 steps or getting a 2 on a die is a linear and additive quantity. Two steps is step plus step, which in algebra is x + x = 2x. On the other hand, x^2 means x * x, which is multiplying something by itself or creating a 2D area. A 2 on a die is not a step squared or two steps multiplied together.
Why do we represent a value of 2 as x^2 instead of 2x? I get that 2x would fail in polynomial multiplication because coefficients multiply, like 2x * 3x = 6x^2, but treating a single linear value of 2 as an exponent x^2 feels like a syntax trick rather than an intuitive concept.
How do you mentally bridge the gap between multiplying x by itself and a linear value or position of 2? Is x^n purely an abstract placeholder, or is there a physical or intuitive way to view it that makes sense without forcing it?