Answers NC-Math 4 CRAdd and Subtract Complex Numbers

Add and Subtract Complex Numbers Answers

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Consider z1 = 4 – 4 i and z2 = –16i. What is z1 – z2?

4 – 12

4 + 12

4 – 4( – 4)i

4 + 4 ( – 4)i

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Review the graph.

Consider and z = 1(cos(60°) + isin(60°)). What is w + z expressed in rectangular form?

StartFraction StartRoot 3 EndRoot minus 1 Over 4 EndFraction i

StartFraction StartRoot 3 EndRoot + 1 Over 4 EndFraction i

StartFraction StartRoot 3 EndRoot minus 1 Over 2 EndFraction i

StartFraction StartRoot 3 EndRoot + 1 Over 2 EndFraction i

Given w1 = –2 + 3i and w2 = 4 – 4i, which complex number can be added to w1 to produce w2?

6 – i

–6 – i

6 – 7i

–6 + 7i

Review the graph.

What is the sum of – i and 2 – i?

(2 + ) – (1 – )i

(2 + ) – (1 + )i

(2 + ) + (1 + )i

(2 + ) + (1 – )i

Consider w1 = 4 – 4i and w2 = –2. What is w2 – w1?

2 – 4i

2 + 4i

–6 + 4i

–6 – 4i

Consider w1 = –3i and w2 = –2. What is the result of subtracting w2 from w1?

–i

2 – 3i

–2 + 3i

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