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Determinants (p-1) — Maths (commerce) STD 11 Commerce / Arts — Question

Maharashtra BoardEnglish MediumSTD 11 Commerce / ArtsMaths (commerce)Determinants (p-1)3 Marks
Question
Solve the following equations.
i) $\left|\begin{array}{lll}x & 2 & 2 \\ 2 & x & 2 \\ 2 & 2 & x\end{array}\right|=0$
ii) $\left|\begin{array}{ccc}1 & 4 & 20 \\ 1 & -2 & 5 \\ 1 & 2 x & 5 x^2\end{array}\right|=0$
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