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Name: ________________________ Class: ___________________ Date: __________
Section 01-04 Sample Quiz - Complex Numbers
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. Simplify the complex expression: (2 + 4i) + (-6 – 4i).
a. -4i
c. - 28 – 32i
b. -4
d. - 4 + 8i
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2. Simplify the complex expression: 3i + 4 – 3i + 2i – 6.
a. - 2
c. - 2 + 2i
b. - 2i
d. 2 – 2i
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3. Simplify the complex expresion: 3i(5 – 2i).
a. 15 – 6i
b.
____
5 + 9i
5. Simplify the complex square (3 – 2i)2.
a. 9 – 4i2
b.
____
15 + 2i
d.
21i
4. Simplify the complex expresion: (2 + 4i)(3 + 5i).
a. 6 + 20i
c.
b.
____
6 + 15i
c.
13
6. Simplify the following complex number:
a. 1
b. 1
10 + 12i
d.
-14 + 22i
c.
5 – 12i
d.
13 – 12i
c.
d.
i
i
i 15
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7. Find the values of x and y that make the equation true.
2x  8i  6  (2y)i
a. x  3, y   4
c. x   4, y  3
b. x  3, y  4
d. x  4, y   3
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8. Find the values of x and y that make the equation true.
4 (4i  6)  (4x)i  8y
a. x  2, y  6
c. x  4, y  3
b. x  6, y  2
d. x  3, y  4
1
ID: A