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Complex Number

Authored by Mollie Fisher

Mathematics

9th Grade

Complex Number
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5 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does i2 = ?

-1
√-1
1
-√1

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Simplify 
√-25

-5i
5
5i
-5

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Simplify
2i - 7i + 10

-5i+10
5i
9i+10
5i+10

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Simplify
3i - (4 + 7i)

-4 + 10i
21 - 12i
4 - 10i
-4 - 4i

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Simplify: 
(7 + 2i)(9 - 6i)

75-24i
63 - 24i  - 12i2
51 - 24i
58 + 60i

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