Explanation:

(b)

|A^3&minus;3A^2 &minus; 5A| = 0 (given)

= |A (A^2 &minus; 3A &minus; 5I)| = 0

= |A||A^2 &minus; 3A &minus; 5I| = 0

= |A| = 0

= |A| = a &times; 1 &ndash; 2 &times; 3 = 0

Therefore, a = 6 Ans.

IPMAT Indore 2023 - QA (MCQ) Q22 Explanation

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