Finding Complex Roots on Casio Classwiz fx-991EX Calculator | A-level Further Maths - YouTube
Negative input of frequency results in “Math Error” in classwiz calculator, but it works fine with the 95es+. Is there a setting to fix this? : r/ calculators
Scientific Calculator Casio Fx-991ex Classwiz With Solar Battery Non-programmable And Allowed For Ege 552 Functions Carbon Body Design - Calculators - AliExpress