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1. |
Solve y4 - 18y2 + 81 = 0. |
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A. |
3, 3i |
B. |
-3, 3, -3i, 3i |
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C. |
3 |
D. |
-3, 3 |
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Hint |
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2. |
Solve  . |
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A. |
-4, 2 |
B. |
4, 16 |
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C. |
16 |
D. |
4 |
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Hint |
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3. |
Write the expression  in quadratic form. |
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A. |
 |
B. |
 |
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C. |
 |
D. |
 |
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Hint |
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4. |
Write the expression  in quadratic form. |
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A. |
 |
B. |
 |
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C. |
cannot be done, since  |
D. |
 |
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Hint |
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5. |
Solve  |
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A. |
1, 1.22 |
B. |
 |
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C. |
 |
D. |
1, 11.31 |
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Hint |
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