Place value: 54069,269 = (5 x 10000000) + (4 x 1000000) + (6 x 10000) + (9 x 1000) + (2 x 100) + (6 x 10) + (9 x 1) = 50000000 + 4000000 + 60000 + 9000 + 200 + 60 + 9
5 - ten million's place
4 - million's place
6 - ten thousand's place
9 - thousand's place
2 - hunderd's place
6 - ten's place
9 - one's place
54069,269 = 0.54069269 x 108 = 54.069269 x 106 = 54069.269 x 103 = 54069,269 x 100 =
= 5406926,900 x 10-2 = 54069269000,000 x 10-6
2. Main differences between complex and real numbers:
Examples: you can compare real numbers, for instance, -120 < 5.67 or "\\dfrac{1}{3}" > "\\dfrac{2}{27}" , but you can't do this to complex numbers. Polynomial x4 + 2x3 + x2 + 5x +12 would have 4 roots(with complex roots), because n = 4. Also for equation like x2 = -1 there will be two solutions: i and -i.
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