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1. |
Solve x2 - 6x + 25 = 0. |
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A. |
6 ± 8i |
B. |
-3 ± 4i |
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C. |
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D. |
3 ± 4i |
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Hint |
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2. |
Solve x2 + 14x + 49 = 0 by using the quadratic formula. |
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A. |
6, 16 |
B. |
7, –18 |
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C. |
–3, –8 |
D. |
3, 8 |
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Hint |
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3. |
Find the value for the discriminant for the following equation:  . Then describe the number and type of roots. |
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A. |
The discriminant is 100, which is not a perfect square; therefore, there are two irrational roots |
B. |
The discriminant is 96, which is not a perfect square; therefore, there are two irrational roots. |
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C. |
The discriminant is negative, so there are two complex roots. |
D. |
The discriminant is 100, which is a perfect square; therefore, there are two rational roots |
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Hint |
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4. |
If a perfect square is equal to a constant, what is the best method to solve the quadratic equation? |
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A. |
Factoring |
B. |
Quadratic Formula |
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C. |
Square Root Property |
D. |
Completing the Square |
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Hint |
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5. |
Solve  by using the quadratic formula. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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