IF ` 3+i` is a root of the equation ` x^2 + ax + b=0` then a=

A

3

B

-3

C

6

D

-6

Verified by Experts

The correct Answer is:

D

Similar Questions

Explore conceptually related problems

The roots of the equation x^2+ax+b=0 are

If 1 - I is a root of the equation x^(2) + ax +b = 0 where a b in R then value of a is

If p + iq be one of the roots of the equation x^(3) +ax +b=0 ,then 2p is one of the roots of the equation

If 3+4i is a root of the equation ax^(2)+bx+c= 0 where a, b, c in R then 31a+b+c=

The roots of the equation x^(2)-2ax+8a-15=0 are equal, then a =

If 1,2,3 and 4 are the roots of the equation x^4 + ax^3 + bx^2 +cx +d=0 then a+ 2b +c=

If 1,2,3 are the roots of the equation x^(3) + ax^(2) + bx + c=0 , then

If alpha, beta are roots of the equation ax^2 + bx + c = 0 then the equation whose roots are 2alpha + 3beta and 3alpha + 2beta is

If the product of the roots of the equation 2x^2 + ax + 4 sina = 0 is 1, then roots will be imaginary, if

if alpha&beta are the roots of the quadratic equation ax^2 + bx + c = 0 , then the quadratic equation ax^2-bx(x-1)+c(x-1)^2 =0 has roots