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Complex Numbers

Authored by Jun Aida.

Mathematics

University

CCSS covered

Used 88+ times

Complex Numbers
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10 questions

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1.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

What is  (35i)+(4+7i)\left(3-5i\right)+\left(-4+7i\right)  ? 

 1+2i-1+2i  

 712i7-12i  

 1+2i1+2i  

 2+3i-2+3i  

Tags

CCSS.HSN.CN.A.2

2.

MULTIPLE CHOICE QUESTION

10 sec • 1 pt

  What is (5+3i)(4+7i)?\ What\ is\ \left(-5+3i\right)-\left(4+7i\right)?  

 14i-1-4i  

 94i-9-4i  

 1+4i-1+4i  

 9+4i-9+4i  

Tags

CCSS.HSN.CN.A.2

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 If z1=2+5i and z2=321, what is z1×z2 If\ z_1=2+5i\ and\ z_2=3-21,\ what\ is\ z_1\times z_2\   as a single complex number.

 4+11i-4+11i  

 610i6-10i  

 1619i16-19i  

 16+11i16+11i  

Tags

CCSS.HSN.CN.C.8

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 What is (45i)(2+7i)?What\ is\ \left(4-5i\right)\left(-2+7i\right)?  

 27+18i27+18i  

 43+38i-43+38i  

 43+18i-43+18i  

 27+38i27+38i  

Tags

CCSS.HSN.CN.A.2

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 What is (3+4i)(34i)?What\ is\ \left(3+4i\right)\left(3-4i\right)?  

 916i9-16i  

 2525  

 9+16i9+16i  

 7-7  

Tags

CCSS.HSA.APR.A.1

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 Write 2+5i3+i Write\ \frac{2+5i}{3+i}\   as a single complex number.

 2+5i2+5i  

 1110+1310i\frac{11}{10}+\frac{13}{10}i  

 310+1310i\frac{3}{10}+\frac{13}{10}i  

 118+138i\frac{11}{8}+\frac{13}{8}i  

Tags

CCSS.HSN.CN.A.3

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

 Write 73i52iWrite\ \frac{7-3i}{5-2i}  as a single complex number.

 75+32i\frac{7}{5}+\frac{3}{2}i  

 4129129i\frac{41}{29}-\frac{1}{29}i  

 1129i1-\frac{1}{29}i  

 4129i\frac{41}{29}-i  

Tags

CCSS.HSN.CN.A.3

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