Question

Help Please! I'm about to have a meltdown


You are given two complex numbers: z = 2-4i and w = 1+3i. Find the following. Give the answers in the form a+bi.
Note: if a number does not have a real part, enter "0" for a. Similarly, if a number does not have an imaginary part, enter "0" for b.
a) The sum:

b) The difference z-w:

c) The product:

d) The quotient z \w:

e) Simplify i^5:

Answer 1

OK, the sum of two complex numbers is easy:

(a +bi ) + (c + di) = (a+c) + (b+d)i

just add the reals, and add the imaginary's

Answer 2

same idea for the difference

Answer 3

So can you figure out what the sum ought to be?

Answer 4

yes i think so.

Answer 5

OK, let me know what you get. :)

Answer 6

3-7i ?

Answer 7

am i distributing?

Answer 8

(2 - 4i) + (1 + 3i) = 2 - 4i + 1 + 3i = 2 + 1 - 4i + 3i = 3 - i

Answer 9

treat the i's like x's in algebra and you will get the right answer

Answer 10

thanks!