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Mathematics 18 Online
OpenStudy (anonymous):

PLEASE PLEASE PLEASE HELP!!

OpenStudy (ja1):

YESYESYESYESYESYEYSESSREWQWF

OpenStudy (anonymous):

PLEASE TELL ME WHAT IS YOUR QUESTION

OpenStudy (anonymous):

lol thank you

OpenStudy (anonymous):

Rationalize tha denominator of that.

OpenStudy (anonymous):

PLEASE c: lol

OpenStudy (anonymous):

Answer choices:

OpenStudy (anonymous):

But if you could.. Tell me how you do it, so I can fully understand..

OpenStudy (luigi0210):

Add them, then multiply by the conjugate

OpenStudy (anonymous):

√-4 / [(7-3i) + (2+5i)] √-4 / (7 - 3i + 2 +5i) 2i / (9 +2i) rationalize by multiplying top and bottom by denominator's conjugate: (9 - 2i): 2i(9 -2i) / (9+2i)(9-2i) 2i(9 -2i) / [9(9) + 9(-2i) +2i(9) -4i^2] (18i - 4i^2) / (81 -18i +18i -4i^2)

OpenStudy (anonymous):

Finish it

OpenStudy (anonymous):

WHAT lol

OpenStudy (anonymous):

finish the problem

OpenStudy (anonymous):

answering

OpenStudy (luigi0210):

I think you might of lost her there passive :P

OpenStudy (anonymous):

yep

OpenStudy (anonymous):

.-. ya u did lol

OpenStudy (anonymous):

Ill just guess it ... lol

OpenStudy (anonymous):

start with \[\frac{2i}{9+2i}\] then multiply top and bottom by the conjugate of the denominator \[\frac{2i}{9+2i}\times \frac{9-2i}{9-2i}\]

OpenStudy (anonymous):

Thanks guys :D

OpenStudy (anonymous):

(18i - 4(-1)) / (81 -4(-1))

OpenStudy (anonymous):

the denominator is \(9^2+2^2=81+4=85\)

OpenStudy (anonymous):

the numerator is \(18i+4\)

OpenStudy (anonymous):

finish it now rae

OpenStudy (luigi0210):

You got this Rae! :D

OpenStudy (anonymous):

Here is a medal for encouraging her

OpenStudy (luigi0210):

I'm not sure if I deserve a medal for that but thank you passive :P

OpenStudy (anonymous):

4/85 + 18i/85

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