# Math Help - Complex Numbers

1. ## Complex Numbers

1) Find the sum of ix^2-(2+3i)x+2 and 4x^2+(5+2i)x-4i

2) Simplify [(3+i)x^2-ix+4+i] - [(-2+3i)x^2+(1-2i)x-3]

Any help would be appreciated, thanks in advance.

2. Originally Posted by trancefanatic
1) Find the sum of ix^2-(2+3i)x+2 and 4x^2+(5+2i)x-4i

2) Simplify [(3+i)x^2-ix+4+i] - [(-2+3i)x^2+(1-2i)x-3]

Any help would be appreciated, thanks in advance.
1) sum of
$ix^2 - (2+3i)x + 2$ and $4x^2+(5+2i)x-4i$

$= (4+i)x^2 + (3-i)x + (2-4i)$

2) simplify
$[(3+i)x^2 - ix + 4+i]-[(-2+3i)x^2 + (1-2i)x - 3]$

$= (5-2i)x^2 + (-1+i)x +7+i$

3. Thank you for the answers, but I'm not sure how you got that answer. I'm looking for procedures because I'm still unsure on how to start...

4. Originally Posted by trancefanatic
I'm looking for procedures because I'm still unsure on how to start...
Do you know how to add $\left[ {4x^2 - 3x + 1} \right] + \left[ {x^2 + 5x - 2} \right]$?

Do you know how to add $\left( {3 - 4i} \right) + (2 + 6i) - (1 - 3i)$?

If so just combine the two ideas. Add "like terms"!