The values of k for which the equations x 2 - kx - 21 = 0 and x 2 - 3kx + 35 = 0 will…
Mathematics · JEE Main · NTA Exams — Complex Numbers and Quadratic Equations
The values of k for which the equations x2 - kx - 21 = 0 and x2 - 3kx + 35 = 0 will have a common root are
- k = \(\text { ± }\) 4
- k = \(\text { ± }\) 1
- k = \(\text { ± }\) 3
- k = 0
Answer
(A) k = ± 4
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