If `2+ i sqrt3` is a root of the equation `x^(2)+px+q=0`, where p and q are real then find the value of p and q.

If one root of the equation x^(2)+px+12=0 is 4, while the equation x^(2)+px+q=0 has equal roots, then the value of q is a)4 b)12 c)3 d) (49)/(4)

If the roots of the equation x^(2) + px + c =0 are 2,-2 and the roots of the equation x^(2) + bx + q=0 are -1,-2 , then the roots of the equation x^(2) + bx + c =0 are