Find the modulus and argument of the following complex number. z= (3+2j) (- 1+2j), giving the principal value in degrees to 3 d.p. A =V65, arg (z) = - 150.2550 B =/65, arg (z) = 150.2550 © I:l=/65, arg (2) = - 29.7450 D=/65, arg (z) =29.7350

Q: #4. Show that equation | 2-1-2|=1 Can be written as 121²2 Re Z-2 Im Z +1=0.

A: Given equation  z-1-i  =1. Show that: z2 -2 Rez -2 Imz +1=0.

Q: 7. Multiply the following two complex numbers: (4 - 5i)(-2 + 7i)

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A: To find the magnitude of the complex number

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A: Using z= r(cos theta +i sin theta)

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