anonymous
  • anonymous
simplify
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1438029178146:dw|
Nnesha
  • Nnesha
multiply denominator and number by the conjugate of 2+7i
Nnesha
  • Nnesha
what is the conjugate of 2+7i ? do you know ?

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More answers

anonymous
  • anonymous
2-7i
Nnesha
  • Nnesha
yep right so multiply \[\huge\rm \frac{ 2 }{ 2+7i } \times \frac{ 2-7i }{ 2-7i }\] multiply numerator by numerator and denominator by denominator
anonymous
  • anonymous
is the answer ???|dw:1438033232517:dw|
Nnesha
  • Nnesha
how did you get 8 at the numerator ?
Nnesha
  • Nnesha
\[\huge\rm \frac{ 2 }{ 2+7i } \times \frac{ 2-7i }{ 2-7i }\] \[\frac{ 2(2-7i) }{ (2+7i)(2-7i) }\] distribute parentheses by 2
anonymous
  • anonymous
|dw:1438034776416:dw|
anonymous
  • anonymous
is that it???
Nnesha
  • Nnesha
how did you get that ?
Nnesha
  • Nnesha
please try to solve it i know those are the options ...... so better to solve than guessing
Nnesha
  • Nnesha
:=)
anonymous
  • anonymous
thats the only answer that has 4 in it
Nnesha
  • Nnesha
post all of them
anonymous
  • anonymous
|dw:1438035370710:dw|
anonymous
  • anonymous
|dw:1438035413441:dw|
anonymous
  • anonymous
thats all four
Nnesha
  • Nnesha
oh true nvm
Nnesha
  • Nnesha
my mistake i typed 2 instead 4 sorry about that
anonymous
  • anonymous
im confused
Nnesha
  • Nnesha
so first time you got it right
Nnesha
  • Nnesha
well there is 4 in the original question i typed 2 and u didn't correct me ..
Nnesha
  • Nnesha
my mistake..
anonymous
  • anonymous
so the answer is 8-28i over 53?
Nnesha
  • Nnesha
yep
anonymous
  • anonymous
okay thanks

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