NCERT Mathematics Class 10 Exemplar Ch 4 Quadratic Equations Part 1
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EXERCISE 4.1
1. Which of the following is a quadratic equation?
(A) (B)
(C) (D)
Answer: D
2. Which of the following is not a quadratic equation?
(A) (B)
(C) (D)
Answer: C
3. Which of the following equations has 2 as a root?
(A)(B)
(C) (D)
Answer: C
4. If is a root of the equation , then the value of k is
(A) 2 (B) – 2
(C) (D)
Answer: A
5. Which of the following equations has the sum of its roots as 3?
(A)(B)
(C) (D)
Answer: B
6. Values of k for which the quadratic equation has equal roots is
(A) 0 only (B) 4
(C) 8 only (D) 0, 8
Answer: D
7. Which constant must be added and subtracted to solve the quadratic equation by the method of completing the square?
(A) (B)
(C) (D)
Answer: B
8. The quadratic equation has
(A) two distinct real roots (B) two equal real roots
(C) no real roots (D) more than 2 real roots
Answer: C
9. Which of the following equations has two distinct real roots?
(A) (B)
(C)
Answer: B
10. Which of the following equations has no real roots?
(A) (B)
(C) (D)
Answer: A
11. has
(A) four real roots (B) two real roots
(C) no real roots (D) one real root.
Answer: C