Tip & How-To about Casio FX-115ES Scientific Calculator
When you push the change sign (-) button, a number button, and any even power it returns a negative value.
In other words if you type -4^2 it will treat it like this:
-(4)^2 = -16
Even though any number to an even exponent should be even. To get around this any time you have an even power on a negative number type it like this.
(-4)^2 = 16
Posted by Anonymous on
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