# Casio fx-115ES PLUS bonus features (n-th root, complex number, log with any base) | Summary and Q&A

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June 30, 2016
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Casio fx-115ES PLUS bonus features (n-th root, complex number, log with any base)

## TL;DR

"Learn how to use a Casio calculator to calculate square roots, cube roots, and complex numbers."

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### Q: How can you enter a cube root on a Casio calculator?

To enter a cube root, press the shift key followed by the cube root symbol. Then enter the number you want to find the cube root of.

### Q: Can you calculate the fourth root on a Casio calculator?

Yes, the fourth root can be calculated by using the power key and the radical symbol. Press the shift key followed by the power key and enter the index as 4. Then enter the number and press equal.

### Q: What happens if you enter a negative number into the square root on a Casio calculator?

If you enter a negative number into the square root, the calculator will display a math error. Square roots of negative numbers are not real numbers.

### Q: Can the Casio calculator handle calculations with complex numbers?

Yes, the calculator can perform calculations with complex numbers. In the complex mode, complex numbers can be raised to a power or divided using the fraction key.

## Summary & Key Takeaways

• The Casio calculator has a square root key and a cube root symbol that can be accessed by pressing the shift key.

• To calculate the fourth root, the power key and radical symbol can be used, along with the fraction key to enter the index.

• Negative numbers cannot be entered into the square root, but complex numbers can be used instead.

• The Casio calculator can also perform calculations with complex numbers, such as raising complex numbers to a power and dividing complex numbers.

• The calculator also allows for logarithms with specific bases, but cannot calculate logarithms of negative or zero numbers.