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## Main Question or Discussion Point

hello

can you tell me please why we introduced complex numbers? what was the problem that we couldn't express with rest of algebra and we introduced complex numbers?

I am basically interested in why we introduced complex number to describe and analyze AC circuits, like voltage, current and impedance.

Also, I would like to make clear why we need numbers associated with the square root of -1.

please keep it simple, no knowledge considered granted!

thanks!

can you tell me please why we introduced complex numbers? what was the problem that we couldn't express with rest of algebra and we introduced complex numbers?

I am basically interested in why we introduced complex number to describe and analyze AC circuits, like voltage, current and impedance.

Also, I would like to make clear why we need numbers associated with the square root of -1.

please keep it simple, no knowledge considered granted!

thanks!