Can it handle complex numbers in matrix ?

Yes. .or say within reason. Download the manual from Casio, its free and you dont need to buy calculator.. Look at page 114 and 107. Make sure you download fx-991CW...not fx-991.

¿Este artículo tiene garantía?

Good afternoon, I bought the calculators without a guarantee, but I really don't know if the product has a guarantee, although they should have a guarantee. Regards, AC.

when you turn off the calculator, the calculation history is deleted or not?

The data is deleted when you turn it off. It's the only thing that keeps it from being the perfect scientific calculator for me.

is there a ohms law calculator?

Well any calculator can "do" Ohms law. If ypur worried about remembering it, any programming calculator can store formulas for you...Calculated Industries (yellow calculators) makes 2 Electrical calculators, pretty sure both have Ohms law function key.

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📐 Elevate your calculations—because precision is the new power move.

QR CODE INTEGRATION - Scan and graph results on ClassPad.net for seamless digital workflow.
DURABLE EXAM READY - Non-slip hard case and rounded keys built for intense study sessions and exams.
MEMORY MATH CATALOG - Store up to 9 variables and access 87 constants & conversions instantly.
540 ADVANCED FUNCTIONS - From numeric calculus to matrix solving, master complex problems with ease.
NATURAL TEXTBOOK DISPLAY - See equations exactly as in your textbooks—no more guesswork or errors.

The Casio fx-991CW is a solar-powered advanced scientific calculator featuring a high-resolution 4-tone natural textbook display, over 540 functions including numeric calculus and matrix operations, memory storage for 9 variables, and QR code functionality for graphing. Designed for engineering, science, and exam use, it combines durability with cutting-edge tech to boost accuracy and efficiency.

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Number of Batteries	1 LR44 batteries required. (included)
Display Type	LCD
Power Source	Solar Powered
Screen Size	2.25 Inches
Calculator Type	Engineering/Scientific
Item Dimensions L x W	6.3"L x 3"W
Material	Plastic
Color	Black

Casiofx-991CW– Advanced Scientific Calculator with High-Res 4-Tone Display | Natural Textbook Display | 540+ Functions, Numeric Calculus, Matrix Solver | Ideal for Engineering, Science & Exams

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