# 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)

2. Which of the following is not a quadratic equation?

(A) (B)

(C) (D)

3. Which of the following equations has 2 as a root?

(A)(B)

(C) (D)

4. If is a root of the equation , then the value of k is

(A) 2 (B) – 2

(C) (D)

5. Which of the following equations has the sum of its roots as 3?

(A)(B)

(C) (D)

6. Values of k for which the quadratic equation has equal roots is

(A) 0 only (B) 4

(C) 8 only (D) 0, 8

7. Which constant must be added and subtracted to solve the quadratic equation by the method of completing the square?

(A) (B)

(C) (D)

(A) two distinct real roots (B) two equal real roots

(C) no real roots (D) more than 2 real roots

9. Which of the following equations has two distinct real roots?

(A) (B)

(C)

10. Which of the following equations has no real roots?

(A) (B)

(C) (D)