How do you simplify (sqrt3-i)div(2-2sqrt3i)(3i)÷(223i)?

1 Answer
Dec 4, 2016

The answer is =sqrt3/4+i/4=34+i4

Explanation:

When you have a fraction of complex numbers,

w=z_1/z_2w=z1z2

Multiply numerator and denominator by the conjugate of the denominator

w=(z_1*barz_2)/(z_2*barz_2)w=z1¯z2z2¯z2

If the complex number is z=a+ibz=a+ib

The conjugate is barz=a-ib¯z=aib

and i^2=-1i2=1

w=(sqrt3-i)/(2-2sqrt3i)w=3i223i

=((sqrt3-i)(2+2sqrt3i))/((2-2sqrt3i)(2+2sqrt3i))=(3i)(2+23i)(223i)(2+23i)

=(2sqrt3+2*3i-2i-2sqrt3i^2)/(4-4*3i^2=23+23i2i23i2443i2

=(4sqrt3+4i)/16=43+4i16

=sqrt3/4+i/4=34+i4