axyoungcva
axyoungcva axyoungcva
  • 02-01-2017
  • Mathematics
contestada

Write (21 − 4i) − (16 + 7i) + 28i as a complex number in standard form.

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bcalle
bcalle bcalle
  • 02-01-2017
standard form is a + bi
Combine like terms
5 + 17i
Answer Link
apologiabiology
apologiabiology apologiabiology
  • 02-01-2017
treat i as a placeholder
get into standard form (a+bi)

distribute stuf and move
21-4i-16-7i+28i
21-16-4i-7i+28i
5+17i
Answer Link

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