Q. The product of the roots of the equation 2x^2 - 3x + 1 = 0 is equal to?
Solution
The product of the roots is given by c/a. Here, c = 1 and a = 2, so the product is 1/2.
Correct Answer:
A
— 1/2
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Q. The product of the roots of the equation 2x^2 - 4x + 2 = 0 is equal to what?
Solution
The product of the roots of the equation ax^2 + bx + c = 0 is given by c/a. Here, c = 2 and a = 2, so the product is 2/2 = 1.
Correct Answer:
A
— 1
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Q. The product of the roots of the equation 2x^2 - 8x + 6 = 0 is equal to?
Solution
The product of the roots of the equation ax^2 + bx + c = 0 is given by c/a. Here, c = 6 and a = 2, so the product is 6/2 = 3.
Correct Answer:
A
— 3
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Q. The product of the roots of the equation x^2 + 7x + 10 = 0 is:
Solution
The product of the roots is given by c/a = 10/1 = 10.
Correct Answer:
A
— 10
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Q. The product of the roots of the equation x^2 - 7x + k = 0 is 10. What is the value of k?
Solution
Using Vieta's formulas, the product of the roots is k = 10. Thus, k = 17.
Correct Answer:
B
— 17
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Q. The product of the roots of the quadratic equation 3x^2 - 12x + 9 = 0 is: (2021)
Solution
The product of the roots is given by c/a, which is 9/3 = 3.
Correct Answer:
B
— 3
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Q. The product of the roots of the quadratic equation x^2 + 5x + 6 = 0 is: (2021)
Solution
The product of the roots is given by c/a = 6/1 = 6.
Correct Answer:
A
— 6
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Q. The product of two complex numbers z1 = 1 + i and z2 = 2 - i is?
-
A.
3 + i
-
B.
3 - i
-
C.
2 + 3i
-
D.
2 - 3i
Solution
z1 * z2 = (1 + i)(2 - i) = 2 - i + 2i - i^2 = 2 + 1 + i = 3 + i.
Correct Answer:
A
— 3 + i
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Q. The product of two consecutive integers is 240. What are the integers? (2022)
-
A.
14 and 15
-
B.
15 and 16
-
C.
16 and 17
-
D.
12 and 13
Solution
Let the integers be n and n+1. Then n(n+1) = 240. Solving the quadratic equation n^2 + n - 240 = 0 gives n = 14, so the integers are 14 and 15.
Correct Answer:
A
— 14 and 15
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Q. The professor's lecture on economic theories was __________, providing students with a comprehensive understanding of the subject.
-
A.
superficial and lacking depth.
-
B.
confusing and disorganized.
-
C.
thorough and insightful.
-
D.
irrelevant to current issues.
Solution
A comprehensive understanding suggests that the lecture was thorough and insightful, making option 2 the correct choice.
Correct Answer:
C
— thorough and insightful.
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Q. The professor's lecture was filled with __________ insights that challenged the students to think critically about the subject matter.
-
A.
banal
-
B.
trivial
-
C.
profound
-
D.
irrelevant
Solution
The context indicates that the insights were significant and thought-provoking, making 'profound' the correct choice.
Correct Answer:
C
— profound
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Q. The project was completed by the team. What is the active voice of this sentence? (2023)
-
A.
The team completes the project.
-
B.
The team is completing the project.
-
C.
The team completed the project.
-
D.
The project is completed by the team.
Solution
The active voice emphasizes the team as the doer, leading to 'The team completed the project.'
Correct Answer:
C
— The team completed the project.
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Q. The Pulitzer Prize is awarded in which country? (1917)
-
A.
United Kingdom
-
B.
Canada
-
C.
United States
-
D.
Australia
Solution
The Pulitzer Prize is an American award for achievements in newspaper, magazine and online journalism, literature, and musical composition.
Correct Answer:
C
— United States
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Q. The Pulitzer Prize is awarded in which field?
-
A.
Journalism
-
B.
Sports
-
C.
Music
-
D.
Film
Solution
The Pulitzer Prize is awarded for achievements in journalism.
Correct Answer:
A
— Journalism
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Q. The quadratic equation 2x^2 - 4x + k = 0 has no real roots. What is the condition for k? (2022)
-
A.
k < 0
-
B.
k > 0
-
C.
k > 8
-
D.
k < 8
Solution
The discriminant must be less than zero: (-4)^2 - 4*2*k < 0 leads to k > 8.
Correct Answer:
C
— k > 8
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Q. The quadratic equation 2x^2 - 4x + k = 0 has no real roots. What is the condition on k? (2022)
-
A.
k < 0
-
B.
k > 0
-
C.
k > 8
-
D.
k < 8
Solution
The discriminant must be less than zero: (-4)^2 - 4*2*k < 0 leads to k > 8.
Correct Answer:
C
— k > 8
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Q. The quadratic equation 3x^2 + 12x + 12 = 0 can be simplified to what form? (2022)
-
A.
x^2 + 4x + 4 = 0
-
B.
x^2 + 3x + 4 = 0
-
C.
x^2 + 2x + 1 = 0
-
D.
x^2 + 6x + 4 = 0
Solution
Dividing the entire equation by 3 gives x^2 + 4x + 4 = 0.
Correct Answer:
A
— x^2 + 4x + 4 = 0
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Q. The quadratic equation 4x^2 - 12x + 9 = 0 can be factored as: (2023)
-
A.
(2x - 3)(2x - 3)
-
B.
(4x - 3)(x - 3)
-
C.
(2x + 3)(2x + 3)
-
D.
(4x + 3)(x + 3)
Solution
The equation can be factored as (2x - 3)(2x - 3) = 0, indicating a perfect square.
Correct Answer:
A
— (2x - 3)(2x - 3)
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Q. The quadratic equation 5x^2 + 3x - 2 = 0 has roots that can be expressed in which form? (2023)
-
A.
Rational
-
B.
Irrational
-
C.
Complex
-
D.
Imaginary
Solution
The discriminant is 3^2 - 4*5*(-2) = 9 + 40 = 49, which is a perfect square, hence the roots are rational.
Correct Answer:
A
— Rational
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Q. The quadratic equation x^2 + 4x + 4 = 0 has:
-
A.
Two distinct real roots
-
B.
One real root
-
C.
No real roots
-
D.
Infinitely many roots
Solution
The discriminant is 0, indicating one real root (a repeated root).
Correct Answer:
B
— One real root
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Q. The quadratic equation x^2 + 4x + k = 0 has roots that are both negative. What is the condition on k?
-
A.
k < 0
-
B.
k > 0
-
C.
k < 4
-
D.
k > 4
Solution
For both roots to be negative, the sum of roots (4) must be positive and the product (k) must be positive, hence k > 0.
Correct Answer:
C
— k < 4
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Q. The quadratic equation x^2 + 6x + 9 = 0 can be expressed in the form of (x + a)^2. What is the value of a? (2022)
Solution
The equation can be factored as (x + 3)^2 = 0, hence a = 3.
Correct Answer:
A
— 3
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Q. The quadratic equation x^2 + 6x + 9 = 0 can be expressed in which of the following forms? (2020)
-
A.
(x + 3)^2
-
B.
(x - 3)^2
-
C.
(x + 6)^2
-
D.
(x - 6)^2
Solution
This is a perfect square trinomial: (x + 3)(x + 3) = 0.
Correct Answer:
A
— (x + 3)^2
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Q. The quadratic equation x^2 + 6x + 9 = 0 has roots that are:
-
A.
Real and equal
-
B.
Real and distinct
-
C.
Complex
-
D.
None of these
Solution
The discriminant is 0, hence the roots are real and equal.
Correct Answer:
A
— Real and equal
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Q. The quadratic equation x^2 + 6x + k = 0 has equal roots. What is the value of k? (2020)
Solution
For equal roots, b^2 - 4ac = 0. Here, 6^2 - 4(1)(k) = 0, so k = 9.
Correct Answer:
A
— 9
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Q. The quadratic equation x^2 + 6x + k = 0 has no real roots. What is the condition on k? (2020)
-
A.
k < 9
-
B.
k > 9
-
C.
k = 9
-
D.
k ≤ 9
Solution
For no real roots, the discriminant must be less than zero: 6^2 - 4*1*k < 0, which gives k > 9.
Correct Answer:
B
— k > 9
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Q. The quadratic equation x^2 + 6x + k = 0 has roots that are both negative. What is the condition for k? (2020)
-
A.
k > 9
-
B.
k < 9
-
C.
k = 9
-
D.
k = 0
Solution
For both roots to be negative, k must be greater than the square of half the coefficient of x, hence k > 9.
Correct Answer:
A
— k > 9
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Q. The quadratic equation x^2 + kx + 16 = 0 has equal roots. What is the value of k?
Solution
For equal roots, the discriminant must be zero: k^2 - 4*1*16 = 0, solving gives k = -8.
Correct Answer:
A
— -8
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Q. The quadratic equation x^2 + px + q = 0 has roots 3 and -2. What is the value of p?
Solution
Using the sum of roots: p = -(3 + (-2)) = -1.
Correct Answer:
B
— 5
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Q. The quadratic equation x^2 - 3x + 2 = 0 can be factored as?
-
A.
(x-1)(x-2)
-
B.
(x-2)(x-1)
-
C.
(x+1)(x+2)
-
D.
(x-3)(x+2)
Solution
The equation factors to (x-1)(x-2) = 0.
Correct Answer:
A
— (x-1)(x-2)
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