ICSE Board Practice

ICSE Grade VIII - Quadratic Equations
Question 1
1.
    • Solve :
    • (
      x
      2
      )

      (
      x
      6
      )
    • +
    • (
      x
      8
      )

      (
      x
      10
      )
    • =
    • 68

      21
  • (
    8
    ,
    12
    )
  • (
    8
    ,
    16
    )
  • (
    116

    15
    ,
    14
    )
  • (
    102

    13
    ,
    13
    )
  • (
    100

    13
    ,
    10
    )
Question 2
2.
    • Find the roots of the quadratic equation
    • (
      x
      2
       
      +
      6
      x
      +
      8
      )
      =
      0
  • (
    -2
    ,
    -4
    )
  • (
    0
    ,
    -5
    )
  • (
    0
    ,
    -6
    )
  • (
    -1
    ,
    -5
    )
  • (
    -1
    ,
    -4
    )
Question 3
3.
    • Find the discriminant of the quadratic equation
    • (
      x
      2
       
      7
      x
      +
      10
      )
      =
      0
  • 9
  • 8
  • 11
  • 7
  • 10
Question 4
4.
    • Solve :
    •  
       
      9
      x
      2
         
       
       
      9
      a
      b
      x
        +  
       
       
      2
      a
      2
      b
      2
    • = 0
  •  
     
    a
    b

     
     
    3
    ,
     
     
    2
    a
    b

     
     
    3
  •  
     
    a
    b

     
     
    5
    ,
     
     
    2
    a
    b

     
     
    5
  •  
     
    a
    b
    ,
     
     
    4
    a
    b

     
     
    3
  •  
     
    a
    b

     
     
    3
    ,
    0
  •  
     
    a
    b
    ,
     
     
    2
    a
    b
Question 5
5.
    • Find the roots of the quadratic equation
    • (
      24
      x
      2
       
      +
      8
      x
      16
      )
      =
      0
  • (
    2

    5
    ,
    -1
    )
  • (
    2

    5
    ,
    -2
    )
  • (
    4

    3
    ,
    -3
    )
  • (
    4

    3
    ,
    -2
    )
  • (
    2

    3
    ,
    -1
    )
Question 6
6.
    • Solve :
    • (
      3
      x
      +
      6
      )

      (
      x
      +
      10
      )
    • =
    • (
      5
      x
      +
      10
      )

      (
      3
      x
      +
      2
      )
  • (
    11
    ,
    -2
    )
  • (
    14
    ,
    0
    )
  • (
    -11
    ,
    2
    )
  • (
    10
    ,
    -3
    )
  • (
    9
    ,
    -5
    )
Question 7
7.
    • Find the roots of the quadratic equation
    • (
      20
      x
      2
       
      36
      x
      +
      16
      )
      =
      0
  • (
    3
    ,
    2

    5
    )
  • (
    1
    ,
    4

    5
    )
  • (
    2
    ,
    4

    5
    )
  • (
    3
    ,
    4

    3
    )
  • (
    2
    ,
    4

    3
    )
Question 8
8.
    • Find the roots of the quadratic equation
    • (
      x
      2
       
      7
      x
      +
      10
      )
      =
      0
  • (
    7
    ,
    0
    )
  • (
    6
    ,
    1
    )
  • (
    5
    ,
    2
    )
  • (
    7
    ,
    1
    )
  • (
    6
    ,
    2
    )
Question 9
9.
    • Solve the quadratic equation
    •  
       
      x
         
       
       
      6

       
       
      x
      =
       
       
      1
  • (
    3
    ,
    -2
    )
  • (
    4
    ,
    -2
    )
  • (
    5
    ,
    -3
    )
  • (
    5
    ,
    -4
    )
  • (
    4
    ,
    -3
    )
Question 10
10.
    • Solve :
    •    
       
       
      1

       
       
      (
      x
      1
      )
         
       
       
      2

       
       
      (
      x
      +
      1
      )
      =
       
       
      5
  • (



    2
    )
    ,



    2
  • (



    3
    )
    ,



    3
  • (



    5
    )
    ,



    5
  • (



    4
    )
    ,



    4
  • (
    1
    )
    ,
    1