Express in the standard form a+i b: ((-3+i) (4-2 i)
10+10 i
-10 -10 i
-10 + 10 i
None of these
Find the real and imaginary part of (2+i) (3-2 i)
8,1
-8,1
8,-1
-8,-1
If x = 3 + i, then x3 - 3 x2 - 8 x + 15 is equal to
6
10
45
-15
The amplitude of is
π/3
π/4
2 π/3
π/6
If z is a complex number such that Re(z) = Im (z) , then
Re (Z2) = 0
Im (z2) = 0
Re (z2) = Im (z2)
z2 = 0
If Z = r (cos θ + i sin θ), then the value of is
cos 2 θ
2 cos 2θ
2 cos θ
2 sin θ
If Z1 = √2 ( cos π/4) and z2 = √3 (cos π/3 + i sin π/3 ) then |z1z2| is
√2
√6
√3
If (3+i) z = (3-i) , then the complex number z is.
a (3-i), a∈R
, a∈R
a(3+i), a∈R
a (-3 + ), a∈R
If Z3 = -1/2 + √3/2 i, then the conjugate of (Z3)4 is.
The modulus of is
2
3