Casio fx-991CW
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10-07-2022, 11:22 AM
Post: #14
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RE: Casio fx-991CW
I'm pretty sure that the Casio fx-991EX Classwiz already has a 4th degree polynomial solver, 4 x 4 system of linear equations and 4 x 4 matrices. Overall I think the fx-991CW is nice but I don't understand why Casio does still not have a persistent calculation history. That has been a pretty standard feature for decades with competing scientific calculators, right?
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