Question

Add the complex expressions, and simplify.
(9 + 9.4i) + (-8.6 – 4i)

Answer 1

Add the imaginary part together and the real part together

Answer 2

combine like terms

Answer 3

basic rule is\[(c+di)+(a+bi)= (a+c)+(b+d)i\]

Answer 4

ok i am lost

Answer 5

just combine like terms together

like in this question you have
\[(9 + 9.4i) + (-8.6 – 4i)= (9-8.6)+(9.4-4)i\]

Answer 6

ok so would you add the same ones together or would it be like 9
^2

Answer 7

Add the real parts and add the imaginary parts. what is 9+-8.6?

Answer 8

you would add the same ones together

Answer 9

0.4

Answer 10

What is 9.4i -4i?

Answer 11

Yes. so the real part is .4

Answer 12

Now do the imaginary part

Answer 13

you just need to separate the real and the imaginary parts

for real you have 9-8.6=0.4
for imaginary (9.4-4)i = 5.4i

Answer 14

9.4i-4i

Answer 15

So the answer is .4+5.4i