So file(x) = 0. Obtaining the zeroes of this functionality is the same as solving this equation. Within the paragraph right before, the zeroes of this functionality are +1 and −1, so They're the solutions of this equation. We got this equation by subtracting exactly the same thing from https://financefeeds.com/top-5-altcoins-to-lock-in-your-comeback-starts-in-a-few-hours/