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1. |
Which equation is in quadratic form? |
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A. |
x4 - x2 + x - 1 = 0 |
B. |
3x3 + 3x + 3 = 0 |
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C. |
 |
D. |
 |
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Hint |
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2. |
Solve x4 - 5x2 + 4 = 0. |
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A. |
1, 2 |
B. |
-1, 1, -2, 2 |
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C. |
-1, 1, -2i, 2i |
D. |
-1, 1 |
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Hint |
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3. |
Solve y4 - 18y2 + 81 = 0. |
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A. |
-3, 3 |
B. |
-3, 3, -3i, 3i |
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C. |
3, 3i |
D. |
3 |
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Hint |
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4. |
Which is not a root of z3 + 8 = 0? |
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A. |
 |
B. |
2 |
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C. |
 |
D. |
-2 |
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Hint |
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5. |
Solve  . |
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A. |
4 |
B. |
-4, 2 |
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C. |
4, 16 |
D. |
16 |
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Hint |
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