From the sum of 5 – 9i and -4 + 7i, subtract 14 – 3i

Question

azureilai · Answer

Add 5-9i and -4+7i together first, so
5-9i-4+7i
Then combine like terms and subtract 14-3i

anonymous · Answer

so its -13-5i right

azureilai · Answer

1-2i-(14-3i)
-13+i
You forgot to distribute the negative one when subtracting.
because -2i-(-3i)=i

anonymous · Answer

thanks can you help me with this majorly hard problem If (x + yi) + (2(x + yi) + 3i) = 9, what is x + yi?

azureilai · Answer

Just consider x+yi as another number. Problems like these try to use different symbols to confuse you. The equation comes out to
x+yi+2x+2yi+3-=9
Now you can combine like terms.

anonymous · Answer

3yi+3x+3=9?

azureilai · Answer

Yes but put the 3 in front first. Standard form is a+bi
so rewrite it to
3x+3yi+3=9
Im not sure if your teacher wants you to even simplify it down further, but you can also say
3x+3yi-6=0

anonymous · Answer

she want it simplified a little further

azureilai · Answer

You can also rewrite it to 
3(x+yi-2) = 0

anonymous · Answer

think you can help with one more problem