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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Casio FX-991CW Advanced Scientific Calculator

Product ID: 556369443

Details

Brand
Casio
Calculator Type
Colour
Black
Display type
LCD
Material
Plastic
Model name
FX-991CW

📊High-res 2.25" LCD display

🔋Solar powered + battery backup

⚙️552 advanced functions

A$110

Duties & taxes included

In stock

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Description

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

POWER THAT LASTS - Solar-powered with battery backup means uninterrupted performance during long study or work sessions.
TRUSTED BY THOUSANDS - Top-rated with 4.7 stars from over 2,000 users—join the community of high achievers who rely on Casio.
SEE MORE SOLVE FASTER - High-resolution display lets you view complex spreadsheets and 4x4 matrices with crystal clarity.
TEXTBOOK PERFECT INPUT - Natural textbook display ensures symbols and numbers appear exactly as in your study materials—no guesswork.
MASTER CALCULUS BEYOND - Integrated numeric integration, differentiation, and polynomial solvers handle advanced math effortlessly.

The Casio FX-991CW is a solar-powered advanced scientific calculator featuring a high-resolution 2.25-inch LCD screen that displays complex data like spreadsheets and 4x4 matrices. Equipped with 552 functions including numeric integration, differentiation, and polynomial solvers, it offers natural textbook display for intuitive input. Lightweight and highly rated, it’s designed for middle school to college-level math and engineering tasks.

Specifications

ASIN	B0BSJ33C4R
Best Sellers Rank	9,667 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 51 in Scientific Calculators
Brand Name	Casio
Calculator Type	Engineering/Scientific
Colour	Black
Customer Reviews	4.7 4.7 out of 5 stars (2,172)
Display Type	LCD
Enclosure Material	Plastic
Item Dimensions L x W	16.2L x 7.7W centimetres
Item Type Name	Casio Advanced Scientific Calculator
Item Weight	3.35 Ounces
Manufacturer	Casio
Manufacturer Part Number	FX-991EX
Model Name	FX-991CW
Model Number	FX-991CW
Number of Batteries	1 LR44 batteries required. (included)
Number of Items	1
Power Source	Solar Powered
Screen Size	2.25 Inches
UPC	889232615011
Unit Count	1.0 count

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