InterviewSolution
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InterviewSolution
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If the roots of 2x2 + kx + 3 = 0 are real and equal, then the value of k is A) ± 2√6B) ± 6√2 C) ± 4 D) ± 5 |
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Answer» Correct option is (A) ± 2√6 For equal roots, we have \(b^2-4ac=0\) \(\Rightarrow k^2-4\times2\times3=0\) \(\Rightarrow k^2=24\) \(\Rightarrow k=\pm\sqrt{24}\) \(=\pm\sqrt{4\times6}=\pm2\sqrt6\) Correct option is C) ± 2√6 |
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