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        "intro": "<p>Complex numbers are used in many areas of engineering and science. In this quiz we define what a complex number is and explore how two such numbers may be combined together by adding, subtracting, multiplying and dividing. We also show how to find \u2018complex roots\u2019 of polynomial equations. <br><\/p><p>A complex number is a generalisation of an ordinary real number. In fact, as we shall see, for each complex number there is a pair of real numbers ordered in a particular way. Fundamental to the study of complex numbers is the symbol \\(i\\), or sometimes \\(j\\), with the property \\(i^2 = \u22121\\). The algebra of complex numbers is similar to the usual algebra of real numbers.<\/p>",
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            "heading": "What is a Complex Number?",
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            "heading": "Division of Complex Numbers",
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