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Question: Answered & Verified by Expert
If one of the roots of the equation $x^{2}+a x-6=0$ is 1 , then what is $(\mathrm{a}-6)$ equal to?
MathematicsQuadratic EquationNDANDA 2012 (Phase 1)
Options:
  • A -1
  • B 1
  • C 2
  • D -2
Solution:
1890 Upvotes Verified Answer
The correct answer is: -1
Since 1 is the root of given equation $\therefore$ it satisfies the equation. $\therefore(1)^{2}+a(1)-6=0$
$\Rightarrow a-6=-1$

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