Mathematics · 2015
JEE Main · 11 April 2015, Shift 1 · Q65
If |x^2+x, x+1, x-2; 2 x^2+3 x-1, 3 x, 3 x-3; x^2+2 x+3, 2 x-1, 2 x-1| = a x-12, then 'a' is equal to:
If $\displaystyle \left|\begin{array}{ccc}x^2+x & x+1 & x-2 \\ 2 x^2+3 x-1 & 3 x & 3 x-3 \\ x^2+2 x+3 & 2 x-1 & 2 x-1\end{array}\right|=\mathrm{a} x-12$,
then 'a' is equal to :
Official answer
(2)
$\displaystyle 24$
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JEE Main 2015 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.