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OpenStudy (anonymous):
9i-(13+7i) Add or Subtract.
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OpenStudy (anonymous):
9i-(13+7i) =9i+7i-13 =16i-13
OpenStudy (tkhunny):
Try again. That is not correct.
OpenStudy (anonymous):
13+7i =20i 9i-20i =-11i
OpenStudy (tkhunny):
Ummm... No. 9i - (13 + 7i) 9i - 13 - 7i 9i - 7i - 13 2i - 13 Combine LIKE terms only!
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