MCQ : Quadratic Equations - 2


10 Questions MCQ Test Mathematics (Maths) Class 10 | MCQ : Quadratic Equations - 2


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This mock test of MCQ : Quadratic Equations - 2 for Class 10 helps you for every Class 10 entrance exam. This contains 10 Multiple Choice Questions for Class 10 MCQ : Quadratic Equations - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this MCQ : Quadratic Equations - 2 quiz give you a good mix of easy questions and tough questions. Class 10 students definitely take this MCQ : Quadratic Equations - 2 exercise for a better result in the exam. You can find other MCQ : Quadratic Equations - 2 extra questions, long questions & short questions for Class 10 on EduRev as well by searching above.
QUESTION: 1

Which of the following is not a quadratic equation?

Solution:


2x+ 3 + 2√6x + x2 = 3x2 - 5x
3 + 2√6x + 5x= 0

Which is not a quadratic equation.

QUESTION: 2

Which of the following equations has no real roots ?

Solution:

QUESTION: 3

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

Solution:

QUESTION: 4

(x2 + l)2 - x2 = 0 has

Solution:

QUESTION: 5

The quadratic equation  has

Solution:

We have a quadratic equation: 

If we have standard equation ax2 + bx + c  then D = b2 - 4ac

a= 2, b= -√5, c= 1

D = (-√5)2 - (4x2x1)

D= 5 - 8

D = -3

As the value of D<0 so there is no real root

QUESTION: 6

Root of the equation x2 - 0.09 = 0 is

Solution:

x2 - 0.09 = 0
x2 = 0.09
x = √0.09
x = 0.3

QUESTION: 7

If 1/2  is a root of the equation   then the value of k is

Solution:

As 1/2 is a root then it will satisfy the given equation.

Put x = 1/2

1/4 +(k×1/2) - 5/4 =0
k×1/2 =5/4 -1/4
k =2

QUESTION: 8

If the equation x2 - kx +9 = 0 does not possess real roots, then

Solution:
QUESTION: 9

Which of the following equations has - 1 as a root?

Solution:

3x² - 2x - 5 = 0
3x² + 3x - 5x - 5 = 0
3x(x+1) - 5(x+1) = 0
(x+1)(3x-5) = 0
x = -1 and 5/3.

Hence roots of given polynomial are -1 and 5/3.

QUESTION: 10

The quadratic equation  has

Solution:

As, discriminant (b2 - 4ac) of the equation is negative. Therefore, no real roots.

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