Find the sum or difference. Write the answer in standard form.
-$3 \mathrm { i } + ( - 9 - \mathrm { i } )$
A) $9 - 2 i$
B) $9 - 4 \mathrm { i }$
C) $- 9 + 4 \mathrm { i }$
D) $- 9 + 2 \mathrm { i }$

Name: Find the sum or difference. Write the answer in standard form. -$3 \mathrm { i } + ( - 9 - \mathrm { i } )$ A) $9 - 2 i$ B) $9 - 4 \mathrm { i }$ C) $- 9 + 4 \mathrm { i }$ D) $- 9 + 2 \mathrm { i }$
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Question

Quizplus · Accepted Answer

To find the sum, combine like terms: $3i + (-9 - i) = -9 + (3i - i) = -9 + 2i$.

Find the Sum or Difference 3i+(−9−i)3 \mathrm { i } + ( - 9 - \mathrm { i } )3i+(−9−i)

Find the Sum or Difference $3 \mathrm { i } + ( - 9 - \mathrm { i } )$