Complex vs. real results of log(b,a)
when i type "log(2, -8)" in Geogebra Classic (Windows 10, v6.0.620.0-offline), i get the result "undefined".
When i type the same in Geogebra CAS (Windows 10, v6.0.620.0-offlinecas), i get the complex result "(ln(8)+i*pi)/ln(2)". When i use the aprroximate-button, the result turns to "?".
Is this behaviour intended? Unfortunately i cannot find an option to enable/disable complex results - this would be great for introducing the log-function for the first time. Would it be possible to integrate this? Or is this option already there and i have missed it?