Class 12 Book Solution from S N Dey in Determinant Question No: 6B.3.9
দেখাও যে :
\(\begin{vmatrix}
x+4 & 2x & 2x \\[0.3em]
2x & x+4 & 2x \\[0.3em]
2x & 2x & x+4
\end{vmatrix}=(5x + 4)(x-4)^2\)
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