We’re asked to add the

complex number 5 plus 2i to the other complex

number 3 minus 7i. And as we’ll see, when we’re

adding complex numbers, you can only add the

real parts to each other and you can only add the

imaginary parts to each other. So let’s add the real parts. So we have a 5 plus a 3. And then the imaginary

parts– we have a 2i. So plus 2i. And then we have a negative

7i, or we’re subtracting 7i. So minus 7i right over here. And 5 plus 3– that’s

pretty straightforward. That’s just going to be 8. And then if I have

two of something and from that I subtract

seven of that something– and in this case,

the something is the imaginary

unit, the number i. If I have two i’s and I take

away seven i’s, then I have negative five i’s. 2 minus 7 is negative 5. So then I have negative 5i. So when you add these

two complex numbers, you get 8 minus 5i. You get another complex number. It has a real part

and an imaginary part.

@QuantumMaths sir are you serious?? hahahah

Or not…

the comment to view ratio on this is really bad

You are great at math!!

5th comment on a ancient youtube video