# If one root of the equation ax2 + bx+ c=0 is double the other then the relation between a, b, c is

1.  2 b2 =9ac

2.  b2 =ac

3.  b2 =3ac

4.  b2 =9ac

4

2 b2 =9ac

Explanation :
No Explanation available for this question

# If two of the roots of 2x3+7x2+2x-3=0 are differ by 2 then the roots are

1.  -3,1,1/2

2.  3,1,1/2

3.  -3,-1,1/3

4.  -3,-1,1/2

4

-3,-1,1/2

Explanation :
No Explanation available for this question

# If α, β are the roots of 4x2 +3x+7=0 then the value of 1/ β + 1/ α is

1.  3/7

2.  -3/7

3.  4/7

4.  -4/7

4

-3/7

Explanation :
No Explanation available for this question

# If the roots of the equation x3-3px2+3qx-r=0 are in H.P.,then the mean root is

1.  –r/q

2.  r/q

3.  2r/q

4.  3r/q

4

r/q

Explanation :
No Explanation available for this question

# If α, β are the roots of x2-x+2=0 then α3 β + α β3 =

1.  1

2.  -2

3.  3

4.  -6

4

-6

Explanation :
No Explanation available for this question

# The equation whose roots are 0,0,1,1,-1 is

1.  x5+x4-x3+x2=0

2.  x5-x4-x3+x2=0

3.  x5-x4+x3-x2=0

4.  x5+x4-x3-x2=0

4

x5-x4-x3+x2=0

Explanation :
No Explanation available for this question

# If α, β are the roots of ax2+bx+c=0 then α3+ β3 =

1.  a/b

2.  b/c

3.  3abc- b3/a3

4.  c/a

4

3abc- b3/a3

Explanation :
No Explanation available for this question

# If the roots of x3-12x2+39x+k=0 are in A.P.then k=

1.  -18

2.  18

3.  -28

4.  28

4

-28

Explanation :
No Explanation available for this question

# If the sum of the roots of the equation5x2-4x+2+k(4x2-2x-1)=0 is 6, then k =

1.  13/17

2.  17/13

3.  -17/13

4.  -13/11

4

-13/11

Explanation :
No Explanation available for this question

1.  -13

2.  13

3.  -11

4.  11

4