A is a 3×3 matria where 41=3 and A?...
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A is a 3×3 matria where 41=3 and A?5414150, Find the determinant of the matrix - A-25 I(A-21)=) I I deurity materia of order 3. (C) 5 (ds 9

JEE/Engineering Exams
Maths
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( A^{2}-7 A+4 I=0 quad, quad 1 A=3 ) ( (A-2 I)^{2}-3 A=0 ) ( (A-2 I)^{2}=3 A ) ( (A-2 I)(A-2 I)=3 A ) det on both sides [ begin{array}{r}|A-2 T|^{2}=3|A| =[1 A-2 I mid=3end{array} ]
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