anonymous
  • anonymous
Express 1/(4-i)^2 in cartesian form.. is the answer 15/289 + 8i/289?? Am i rite??
Mathematics
jamiebookeater
  • jamiebookeater
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razor99
  • razor99
@Mandy_Nakamoto what kind of equation is that
anonymous
  • anonymous
it says to change it to x+iy form.. under the complex number topic..
razor99
  • razor99
i think your are correct lol not sure

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anonymous
  • anonymous
oh you have to draw it on Argand plane I think
hoblos
  • hoblos
yes you are right XD
anonymous
  • anonymous
yeah but Argand Plane will only give a graphical solution
razor99
  • razor99
yaaa katrina kaif to the resque
hoblos
  • hoblos
1/(4-i)^2 = 1/(15 - 8i) multiply by the conjugate ( 15+8i) (15+8i)/ 289 = 15/289 + 8i/289
anonymous
  • anonymous
Yay! im rite!!!! huhuhu...
razor99
  • razor99
good one Mandy
anonymous
  • anonymous
But about the argand plane.. i have to change the equation to cartesian form first rite??
anonymous
  • anonymous
no in order to draw it on argand plane you only need the x + iy format and the point is (x,y) understand
anonymous
  • anonymous
So bascially the point you will get is (15/289 , 8/289)
razor99
  • razor99
wow Rajarshi you are awesome at maths
anonymous
  • anonymous
but isnt cartesian form=x+iy form??
anonymous
  • anonymous
|dw:1331292622468:dw| get it
anonymous
  • anonymous
Yeah...
anonymous
  • anonymous
Thanks a lot guys!! ^^

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