Store the result in the memory. The approximate answer is -4.012345679 to 9 decimal places. There are some calculations that most calculators and even some computer programs cannot handle. For example, try finding the third root of -8. The answer we expect is -2 but many calculators will show an error.
Some calculators even give a complex number as the answer.
The easiest way to get the real answer is to calculate with positive numbers and determine the sign of the answer yourself.