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What is the value of (–7 + 3i) – (2 – 6i)? –9 + 9i –9 – 3i –5 – 3i –5 + 9i (-7 + 3i) - (2 - 6i) = -7 + 3i - 2 + 6i = (-7 + (-2)) + (3i + 6i) = -9 + 9i This is how I worked it out^ Was I correct?
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5 votes
What is the value of (–7 + 3i) – (2 – 6i)?

–9 + 9i
–9 – 3i
–5 – 3i
–5 + 9i

(-7 + 3i) - (2 - 6i) = -7 + 3i - 2 + 6i = (-7 + (-2)) + (3i + 6i) = -9 + 9i

This is how I worked it out^ Was I correct?

User Babtek
by
7.0k points

2 Answers

6 votes
The answer is correct. If you have a graphing calculator, there is an "i" button, so the calculator does all your work for you and is a good way to check your answers.
User Athap
by
7.9k points
4 votes
-9+9i is in fact correct so A is right
:)
User Gview
by
8.0k points
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