Destinyyyy
  • Destinyyyy
Divide and simplify to the form a+bi... Divide and express the result in standard form. 6i/9-8i
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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Destinyyyy
  • Destinyyyy
4i/1+i
Destinyyyy
  • Destinyyyy
If I remember correctly im suppose to times the top and bottom by 1-i
welshfella
  • welshfella
multiply denominator and numerator by the conjugate of the denominator

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welshfella
  • welshfella
yes that is correct
Destinyyyy
  • Destinyyyy
4i(1-i)/ (1+i)(1-i)
welshfella
  • welshfella
right
welshfella
  • welshfella
now the denominator will work out to a real number
Destinyyyy
  • Destinyyyy
I dont remember if I cancel out like terms between the top and bottom or if I distribute the 4i
Destinyyyy
  • Destinyyyy
4i+4/2
welshfella
  • welshfella
first compute the denominator (1 + i)( 1 - i) = 1 + i - i -i^2 = ?
Destinyyyy
  • Destinyyyy
1-i^2 ....
welshfella
  • welshfella
and what is i^2 equal to ?
Destinyyyy
  • Destinyyyy
Seriously? -1.
Destinyyyy
  • Destinyyyy
2+2i
welshfella
  • welshfella
yes im serious i^2 = -1 so 1 - i^2 = 1 - (-1) = 2
Destinyyyy
  • Destinyyyy
I already said 2 minutes ago 4i+4/2 .. Im way ahead of you. I already finished
welshfella
  • welshfella
oh sorry i missed that
welshfella
  • welshfella
2 + 2i is the final answer
Destinyyyy
  • Destinyyyy
Its fine. But all im asking for is refreshers.
welshfella
  • welshfella
OK you are doing pretty well
Destinyyyy
  • Destinyyyy
Um thanks
welshfella
  • welshfella
very well
Destinyyyy
  • Destinyyyy
Im working on a different one and im a bit stuck at the end... Divide and express the result in standard form. 6i/9-8i
Destinyyyy
  • Destinyyyy
54i-48/145
welshfella
  • welshfella
this cant be simplfiesdany further 54i 48 --- - -- 145 145
welshfella
  • welshfella
- is the standard form
Destinyyyy
  • Destinyyyy
I got help in another question... And what you said is incorrect.

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