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Question: Answered & Verified by Expert
If 3 is the root of the equation $x^{2}-8 x+k=0$, then what is the val ue of $k$ ?
MathematicsQuadratic EquationNDANDA 2011 (Phase 1)
Options:
  • A $-15$
  • B 9
  • C 15
  • D 24
Solution:
2640 Upvotes Verified Answer
The correct answer is: 15
Since, 3 is the root of the equation $x^{2}-8 x+k=0$ 3 satisfies the equation $x^{2}-8 x+k=0$ $9-24+k=0 \Rightarrow k=1 \mathrm{k}$

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