Question

ii Need help with complex number will anyone with a brain help me :{

Answer 1

Okay, what is your question?

Answer 2

ok ii really dnt understand any of it

Answer 3

Try http://www.purplemath.com/modules/complex.htm

Answer 4

post and you will get many answers i am sure

Answer 5

what abwt the absolute value of 9+2i

Answer 6

ignore the "i" entirely and square
no minus signs

Answer 7

lost

Answer 8

ok good because i was wrong anyway
it is
\[|a+bi|=\sqrt{a^2+b^2}\]

Answer 9

so you have
\[|9+2i|\] right?

Answer 10

STill LosT CoMpLeTeLY LoST...!*

Answer 11

yes

Answer 12

ok what is
\[9^2\]?

Answer 13

iiTsx Jusx 9+2i ND iiT SaYsx FiiNd ThEe Absolute value

Answer 14

yes i know. that is what we are going to do.
you need to square 9
then square 2
then add those numbers together
then take the square root of the result

Answer 15

\[9^2=81\]
\[2^2=4\]
\[81+4=85\]so far so good?

Answer 16

your answer is
\[\sqrt{85}\]

Answer 17

iiHave ThT So SiiMpLiiFiiED iiT WuLD B 5\[\sqrt{?}\]13

Answer 18

no it is
\[\sqrt{85}\], which is not 13 because
\[13^2=169\] not 85

Answer 19

no but ii have to simplify thee square root of 85 rite

Answer 20

i would leave it like that. if you want a decimal you have to use a calculator

Answer 21

no iijusx have 2 simplfied which i did because 13*5 give yhu 85 which 13 cnt b simplified so it wuld 5 timesx the squareroot of 13 iithink

Answer 22

it is true that
\[\sqrt{85}=\sqrt{5\times 13}\] but that is not the same as
\[5\sqrt{13}\]

Answer 23

iiWasx TrYiiN 2 Do ThT ThTsx Thee AnSwEr iiGoT BT Yhu PeRnOuNse iiT 5 TiiMesx ThEe Squareroot OF 13 jusx DnT KnW Hw 2 Do ThT Squareroot symbol

Answer 24

hw do yhu include thee squareroot symbol