हल करना det [[3, - 4], [2, 1]] = | Equatix - Math Solver

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Example

3(r+2s)=2t-4

a⋅(b-2)=3b

3(r+2s)=2t-4

a⋅(b-2)=3b

Question

$$|\begin{matrix}3&-4\\ 2&1\end{matrix}|=$$