Problem : Express using the imaginary unit ı .= 5ı .
Problem : Is 3 a complex number?Yes. In standard form, it is written 3 + 0ı . Every real number is a complex number in which the imaginary part equals zero.
Problem : Rewrite the complex number +3ı4 in standard form z = a + bı and find a and b .+3ı4 = 6ı +3 = 3 + 6ı . a = 3 , and b = 6 .
Problem : What is ı618 ?ı618 = (ı4)154ƒı2 = - 1 .
Problem : When the complex number z = - 2 + 3ı is plotted in the complex plane, in which quadrant is it?Quadrant II.
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