Complex Number Question Preview (ID: 47821)


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The complex number (3 - 2i) is a root of a quadratic equation, write another root
a) -3 + 2i
b) 2i
c) -3 -2i
d) 3 + 2i

conjugate of (a + bi) is
a) a + bi
b) -a + bi
c) a - bi
d) -a -bi

i^3
a) -i
b) -1
c) 1
d) 3

i ^2
a) -1
b) i
c) square
d) -i

z = a + bi, imaginary part is
a) bi
b) b
c) z
d) a

2+3i + 4 - i
a) 6 - 2i
b) -6 + 2i
c) 6 + 2i
d) -6 - 2i

z = a + bi, Real part is
a) bi
b) a
c) a + bi
d) z

square root (-1) is
a) - i
b) 2
c) 1
d) i

z = 3 + 4i, modulus of z is
a) 5
b) 0
c) length
d) 4/3

z = 3 + 4i, arg of z in which quadrant?
a) 2
b) 1
c) 3
d) -1

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