Math, asked by shivamkumar3089, 1 year ago

Solve the given determinants

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Answered by naveen11124
1
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Answered by Anonymous
1
Hey there!

Answer:



∆ = \left[\begin{array}{ccc}9&9&12\\1&-3&-4\\1&9&12\end{array}\right]



Expanding C_{1}


∆ = 9 { -3 × 12 - ( - 4 × 9 ) } - 1 { 9 × 12 - 9 × 12 } + 1 { 9 × ( -4 ) - ( - 3 × 12 ) }



∆ = 9 ( - 36 + 36 ) - 1 ( 108 - 108 ) + 1 ( - 36 + 36 )



∆ = 0



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