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Is there a typo on page 126 (or 120 according to the book numbers) where you have written 0.9 x 3 = 0.3, shouldn't this be 2.7, and it seems you have carried it though to your calculations. If this is not an error, I'm am having problems understanding otherwise, because you seemed to have...

Hi, Just a question regarding complex roots of unity, (Terry Lee 2.10 –boredofstudies.orgq 2 iv) The question pretty much says; if (a)(b) = 3, and a + b = -3 find a and b, Then you use a quadratic, x^2 + 3x + 3 = 0 and then you get x=+/-.... How do you know which answer belongs to a, and...