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CBSE Questions for Class 10 Maths Quadratic Equations Quiz 3 - MCQExams.com

Solution of the equation   2x2=4x+3   is
  • 2±102
  • 2±522
  • 1±5
  • 1±10
The discrimination of ax2(a+b)x+b=0 is
  • ab
  • a+b
  • (a+b)2
  • (ab)2
Which of the following is a quadratic equation?
  • x1/2+2x+3=0
  • (x1)(x+4)=x2+1
  • x23x+5=0
  • (2x+1)(3x4)=6x2+3
Solve the given equation by the method of Completion of Squares: x2+4x+4=0?
  • 2
  • 2
  • 4
  • 4
The discriminant (D) of the equation 5x6+1x=0 is ............
  • 4
  • 56
  • 16
  • 56
The roots of quadratic equation xk=kx are ...........
  • k,k
  • k,k
  • k,k
  • k2,k2
 The following equation is a quadratic equation.
 (x+2)3=x34
  • True
  • False
__________ is true for the discriminant of a quadratic equation x2+x+1=0.
  • D=0
  • D<0
  • D>0
  • D is a perfect square
The number of triples (x,y,z) of real numbers satisfying the equation
x4+y4+z4+1=4xyz is
  • 0
  • 4
  • 8
  • More than 8
The following equation is a qudratic equation.
 16x23=(2x+5)(5x3)
  • True
  • False
Check whether the given equation is a quadratic equation or not.
2x27x=0
  • True
  • False
Which of the following methods is/are guaranteed to solve any Quadratic Equation?
  • Factorisation Method
  • Completing Square Method
  • Standard Quadratic Formula
  • Both option b and option c
Identify which of the following equations is a Quadratic Equation.
  • 5x+8=0
  • 2x2+x=21
  • ax+by+c=0
  • None of these.

The Completing Square Method converts the quadratic equation ax2+bx+c=0 into which of the following forms?


  • (px+q)(rx+s)=0
  • px+q=0
  • (x+p)2=q
  • All of the above.

For a quadratic equation in the standard form ax2+bx+c=0, the nature of roots is dependent on the value of ?

  • b2+4ac
  • b2±4ac
  • b24ac
  • b24ac
Check whether the given equation is a quadratic equation or not.
x2+2x3
  • True
  • False
The discriminant of the quadratic equation x24x+a=0 is 164a.
  • True
  • False
Which of the following is a Quadratic Equation?
  • 5x+8=0
  • 6x2+7x=19
  • x+1
  • None of these
Assertion (A): The equation x2x1=12x1 has no root.
Reason (R): x10, then only above equation is defined.
  • Both A and R are true and R is the correct explanation of A.
  • Both A and R are true and R is not the correct explanation of A.
  • A is true but R is false.
  • A is false but R is true
Find roots of equation x211x+28=0 by quadratic formula 
  • 4,7
  • 4,7
  • 4,7
  • 4,7
If the roots of a quadratic equation ax2+bx+c=0 are all real then which one of the following is true?
  • b24ac=0
  • b24ac>0
  • b24ac0
  • b24ac<0
If px2+qx+r=0 has equal roots, then q2=
  • 4p
  • 4pr
  • 8pr
  • pr
If the roots of the equation ax2+bx+c=0 are all real equal then which one of the following is true?
  • b24ac=0
  • b24ac0
  • b24ac<0
  • b24ac>0
If the roots of a quadratic equation are equal, than discriminate is
  • 1
  • 0
  • greater than 0
  • less than 0
Which is a quadratic equation?
  • x+1x=2
  • x2+1=(x+3)2
  • x(x+2)
  • x+1x
The number of integral values of x for which x2+19x+92 is a perfect square is: 
  • 0
  • 1
  • 2
  • 3
The solution of the equation x+1x=2 will be
  • 2,1
  • 0,1,15
  • 1,15
  • None of these
If 81 is discriminant of 2x2+5xk=0 then the value of k is
  • 5
  • 7
  • 7
  • 2
The value of (x3x2x6+2x12x2+5x32x+5x2+5x+6) is:
  • x3x2
  • 1
  • 1
  • 0
Use the quadratic formula to solve x24x8=0.
  • 2±23
  • 1±3
  • 333
  • None of these
0:0:1


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