1) Calculate the divisions

5 – 3i/2 +i

4i/2 -i

2) Solve the quadratic equations:

x2 + 2x + 3 = 0

X2 + 4x + 5 = 0

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- Oct 10th 2007, 01:46 PMKblackHelp with Division and Quadratic equation
1) Calculate the divisions

5 – 3*i*/2 +*i*

4*i*/2 -*i*

2) Solve the quadratic equations:

x2 + 2x + 3 = 0

X2 + 4x + 5 = 0 - Oct 10th 2007, 05:28 PMThePerfectHacker
- Oct 10th 2007, 05:39 PMJhevon
to divide by a complex number, we multiply by it's conjugate over itself, thus:

$\displaystyle \frac {5 - 3i}{2 + i} = \frac {5 - 3i}{2 + i} \cdot \frac {2 - i}{2 - i}$

and

$\displaystyle \frac {4i}{2 - i} = \frac {4i}{2 - i} \cdot \frac {2 + i}{2 + i}$

now simplify