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13. [10 marks] (a) Express the complex number z = 2 -i 3+ 2i in its standard form a + ib.(b) Write z = 3

13. [10 marks] (a) Express the complex number z = 2 -i 3+ 2i in its standard form a + ib.(b) Write z = 3 - 4i in polar form, then find z in polar form.(c) Find all solutions of z' + 27 = 0 and sketch them in the complex plane

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