ELI5: Explain Like I'm 5

Euler's identity

Euler's Identity is a mathematical equation that looks like this: e^{iπ}+1=0. What this equation means is that when you take the number e (which is equal to about 2.71828) and multiply it with something called "imaginary" numbers (which look like this: iπ) and then add 1 to that, the answer is 0. That's what the equation means.
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