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Mathematics 20 Online
OpenStudy (anonymous):

Solve?

OpenStudy (anonymous):

|dw:1346413346472:dw|

OpenStudy (anonymous):

@ghazi

OpenStudy (anonymous):

(a-ib) (a+ib) = a^2 + b^2

OpenStudy (ghazi):

rationalise the left side \[\frac{ 1-ix }{ 1+ix}*\frac{ 1-ix }{ 1-ix }\]

OpenStudy (ghazi):

solve it to reduce it into the form of a+ib

OpenStudy (ghazi):

you will get a and b

OpenStudy (anonymous):

thxxx

OpenStudy (anonymous):

|dw:1346413978329:dw|

OpenStudy (anonymous):

(-x^2 +1)/(x^2 + 1) = a

OpenStudy (ghazi):

yes

OpenStudy (anonymous):

2/(x^2+1) = b

OpenStudy (ghazi):

and find b that will be imaginary part of it

OpenStudy (ghazi):

2x not 2 only 2x/(x^2+1)

OpenStudy (anonymous):

yup

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