Important MCQ Questions for Class 10 Maths Chapter 4 Quadratic Equations

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

If the sum of the roots of x² + 5kx – 7 = 0 is 10, then 

Option A : k = -2

Option B : k = 5

Option C : k = 10

Option D : k = -5

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

If the product of the roots of kx² + 3x – 8 = 0 is -4, then

Option A : k = -2

Option B : k = 8

Option C : k = 2

Option D : k = -7

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

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

The value of k for which the equation x² – 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

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

If the equation x² + (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

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

The value of k for which equation x² + 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

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

The value of k for which equation 2x² – √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

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

The value of k for which equation x² + √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 

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

The value of k for which equation kx² = 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

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

If the roots of ax² + 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