How it is calculated
An even root of a negative number is not defined for real numbers. An odd root keeps the sign.
Root = number ^ (1 / degree)
Where the numbers come from
- Number
- Root degree
Example
The cube root of 8 is 2, because 2³ = 8.
Questions
Is a square root the power 2?
Yes.
Why does the check not always land on the original number?
Roots that are not whole are rounded. A difference in the last digits comes from that, not from another formula.
Can you take a root of zero?
Yes, it equals zero.