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Thank you for correcting the error. To answer your question above, just remember that i ^2 = -1.
you can checkout this video if you have any doubt with i values - ruclips.net/video/56Jrq_4_eKc/видео.htmlsi=0DAc6J3I_NDk4Ukg
How the hell do we know about the right part that gives us the -1?
Hope that helps!
to get the idea you can checkout this video ruclips.net/video/56Jrq_4_eKc/видео.htmlsi=0DAc6J3I_NDk4Ukg
Thank you for correcting the error. To answer your question above, just remember that i ^2 = -1.
you can checkout this video if you have any doubt with i values - ruclips.net/video/56Jrq_4_eKc/видео.htmlsi=0DAc6J3I_NDk4Ukg
How the hell do we know about the right part that gives us the -1?
Hope that helps!
to get the idea you can checkout this video
ruclips.net/video/56Jrq_4_eKc/видео.htmlsi=0DAc6J3I_NDk4Ukg