If one root of the equation 5x2+13x+k =0 is the reciprocal of the other then

1.  k =0

2.  k=5

3.  k=1/6

4.  k=6

View Answer  
4
Correct Answer :

k=5


Explanation :
No Explanation available for this question

If √2 and 3i are the two roots of a biquadratic equation with rational coefficients,then its equation is

1.  x4+7x2+18=0

2.  x4+7x2-18=0

3.  x4-7x2+18=0

4.  x4-7x2-18=0

View Answer  
4
Correct Answer :

x4+7x2-18=0


Explanation :
No Explanation available for this question

If one root of px2-14x+8 =0 is 6 times the other then p=

1.  3

2.  -3

3.  2

4.  1

View Answer  
4
Correct Answer :

3


Explanation :
No Explanation available for this question

If α,β,γ are the roots of the equation x3+ax2+bx+c=0 then α-1+β-1+γ-1=

1.  b/a

2.  c/a

3.  –b/c

4.  a/c

View Answer  
4
Correct Answer :

–b/c


Explanation :
No Explanation available for this question

The equation whose roots are diminished by 1 than those of 4x3-x2+2x-3=0 is

1.  4x3+11x2+12x-3=0

2.  4x3+11x2+12x+2=0

3.  4x3-11x2+12x-3=0

4.  4x3-11x2+12x+2=0

View Answer  
4
Correct Answer :

4x3+11x2+12x+2=0


Explanation :
No Explanation available for this question

If -3,1,8 are the roots of px3+qx2+rx+s=0 then the roots of p(x-3)3+q(x-3)2+r(x-3)+s=0 are

1.  -1,3,10

2.  -2,2,9

3.  -6,-2,5

4.  0,4,11

View Answer  
4
Correct Answer :

0,4,11


Explanation :
No Explanation available for this question

If α,β,γ are the roots of x3+px2+qx+c=0 then ∑α(β+γ)=

1.  -2p

2.  2p

3.  -2q

4.  2q

View Answer  
4
Correct Answer :

2q


Explanation :
No Explanation available for this question

x2 +4ax+3 =0 and 2x2+3ax-9 =0 have a common root, then a =

1.  0

2.  1

3.  -1

4.  ±1

View Answer  
4
Correct Answer :

±1


Explanation :
No Explanation available for this question

If the quadratic equations ax2+2cx+b=0 and ax2+2bx+c=0, (b ≠ c) have a common root then a+4b+4c =

1.  -2

2.  -1

3.  0

4.  1

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

If f(x)=x3-2x2+7x+5 then f(x-2)=

1.  x3-8x2-27x+25

2.  x3+8x2+27x+25

3.  x3-8x2+27x-25

4.  x3+8x2+27x-25

View Answer  
4
Correct Answer :

x3-8x2+27x-25


Explanation :
No Explanation available for this question
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