Q51 / 160 · AP EAMCET 2024 (21 May Shift 1) · Mathematics

If $(3+i)$ is a root of $x^2+a x+b=0$ then $a=$

  • A
    3
  • B
    -3
  • C
    6
  • Correct answer
    D
    -6

Solution

Roots of equation are $(3+i)$ and $(3-i)$
Sum of roots $=-a=6 \Rightarrow a=-6$

Hence, the correct answer is option: 'D'.

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