1.  2

2.  3

3.  4

4.  5

4

4

Explanation :
No Explanation available for this question

# If a,b,c are positive numbers in G.P,then the roots of the equation ax2+bx+c=0

1.  are real and negative

2.  have negative and real parts

3.  are equal

4.  have negative imaginary parts

4

have negative and real parts

Explanation :
No Explanation available for this question

1.  √2

2.  2√2

3.  3√2

4.  4√2

4

2√2

Explanation :
No Explanation available for this question

# If one root of the quadratic equation x2+bx+c=0 is 3-4i then 31a+b+c=

1.  0

2.  2a

3.  2b

4.  2c

4

2c

Explanation :
No Explanation available for this question

# If (3+i) is a root of the equation x2+ax+b=0 then a=

1.  3

2.  -3

3.  6

4.  -6

4

-6

Explanation :
No Explanation available for this question

# If the expression x2-(5m-2)x+(4m2+10m+25)=0 can be expressed as a perfect square,then m=

1.  8/3 or 4

2.  -8/3 or 4

3.  4/3 or 8

4.  -4/3 or 8

4

-4/3 or 8

Explanation :
No Explanation available for this question

# If the roots of the equation x2-15-m(2x-8)=0 are equal the m=

1.  3,-5

2.  3,5

3.  -3,5

4.  -3,-5

4

3,5

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 product of the roots of the equation 5x2-4x+2+k(4x2-2x-1)=0 is 2,then k=

1.  -8/9

2.  8/9

3.  4/9

4.  -4/9

4

-8/9

Explanation :
No Explanation available for this question

1.  -2

2.  -1

3.  1

4.  2

4