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Simplify.\newline−9i+4i-9i + 4i\newlineWrite your answer in the form a+bia + bi.

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Full solution

Q. Simplify.\newline−9i+4i-9i + 4i\newlineWrite your answer in the form a+bia + bi.
  1. Group like terms: Group like terms in −9i+4i-9i + 4i. −9i+4i=(−9+4)i-9i + 4i = (-9 + 4)i
  2. Simplify: Simplify (−9+4)i(-9 + 4)i. (−9+4)i=−5i(-9 + 4)i = -5i

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