Hi students, Welcome to **AMBiPi (Amans Maths Blogs)**. In this article, you will get * Important MCQ Questions for Class 10 Maths Chapter 4 Quadratic Equations*. You can download this PDF and save it in your mobile device or laptop etc.

**Important MCQ Questions of Quadratic Equations Class 10 Question No 21:**

If the sum of the roots of x^{2} + 5kx – 7 = 0 is 10, then

**Option A** : k = -2

**Option B** : k = 5

**Option C** : k = 10

**Option D** : k = -5

**Show/Hide Answer Key**

**Option A : k = -2**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 22:**

If the product of the roots of kx^{2} + 3x – 8 = 0 is -4, then

**Option A** : k = -2

**Option B** : k = 8

**Option C** : k = 2

**Option D** : k = -7

**Show/Hide Answer Key**

**Option C : k = 2**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 23:**

If one of the roots of 5×2 + 13x + k = 0 is reciprocal of other, then

**Option A** : k = 0

**Option B** : k = 5

**Option C** : k = 6

**Option D** : k = 1/6

**Show/Hide Answer Key**

**Option B : k = 5**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 24:**

The value of k for which the equation x^{2} – 3kx + 9k = 0 has equal roots is

**Option A** : k = 0

**Option B** : k = -4

**Option C** : k = 0, 4

**Option D** : k = 0, -4

**Show/Hide Answer Key**

**Option C : k = 0, 4**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 25:**

If the equation x^{2} + (k + 5)x + 9k = 0 has repeated roots, then the values of k are

**Option A** : 3, -2

**Option B** : 25, 1

**Option C** : -3, 2

**Option D** : -5, 7

**Show/Hide Answer Key**

**Option B : 25, 1**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 26:**

The value of k for which equation x^{2} + 4kx + 16 = 0 has different roots is

**Option A** : k ≤ -2, k ≥ 2

**Option B** : -2 ≤ k ≤ 2

**Option C** : k < -2, k > 2

**Option D** : -2 < k < 2

**Show/Hide Answer Key**

**Option C : k < -2, k > 2**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 27:**

The value of k for which equation 2x^{2} – √3x + 3k = 0 has real roots is

**Option A** : k ≤ 1/8

**Option B** : k < 1/8

**Option C** : k ≥ 1/8

**Option D** : k > 1/8

**Show/Hide Answer Key**

**Option A : k ≤ 1/8**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 28:**

The value of k for which equation x^{2} + √2kx + 5 = 0 has no real roots is

**Option A** : k < √10

**Option B** : –√10 < k < √10

**Option C** : k < –√10, k > √10

**Option D** : k > √10

**Show/Hide Answer Key**

**Option B : –√10 < k < √10**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 29:**

The value of k for which equation kx^{2} = 2 + 3x has two real roots is

**Option A** : k < -9/8

**Option B** : k ≤ -9/8

**Option C** : k > -9/8

**Option D** : k ≥ -9/8

**Show/Hide Answer Key**

**Option D : -9/8**

**Important MCQ Questions of Quadratic Equations Class 10 Question No 30:**

If the roots of ax^{2} + bx + c = 0 are in the ratio m : n, then

**Option A** : mna² = (m + n) c²

**Option B** : mnb² = (m + n) ac

**Option C** : mnb² = (m + n)² ac

**Option D** : mnb² = (m – n)² ac

**Show/Hide Answer Key**

**Option C : mnb² = (m + n)² ac**