Find all the square roots of 4 and -4 and plot them. Find the cube roots of 27 and -27 and plot them in the plane. Two cases, more precisely possibilities, will be examined. In retrospect, cosmetic appearance alone would suggest the employment of round-brackets for polar coordinates and square brackets for rectangular coordinates. The development of notation is not always cosmetically optimal.
L ocate the fourth, fifth and sixth roots of unity.
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