So file(x) = 0. Finding the zeroes of this function is the same as resolving this equation. From the paragraph ahead of, the zeroes of this functionality are +one and −one, so These are the solutions of this equation. We obtained this equation by subtracting a similar detail from https://financefeeds.com/24x-exchange-to-launch-nearly-24-hour-u-s-stock-trading-in-september/