If two equations a_ 1 x^ 2 +b_ 1 x+c_ 1 =0 and a_ 2 x^ 2 +b_ 2 x+c_ 2 =0 have a common…

Mathematics · JEE Main · NTA Exams — Complex Numbers and Quadratic Equations

1. \(-\left[a_{1} c_{2}-a_{2} c_{1}\right]^{2}\)
2. \(\left(a_{1} a_{2}-c_{1} c_{2}\right)^{2}\)
3. \(\left(a_{1} c_{1}-a_{2} c_{2}\right)^{2}\)
4. \(\left(a_{1} c_{2}-c_{1} a_{2}\right)^{2}\)

Answer

(D) (a_ 1 c_ 2 -c_ 1 a_ 2 )^ 2

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