Question

I FREAKING NEED HELPPP!!!

Answer 1

`\boxed{\begin{bmatrix}  3 & - 1 \\ - 3 & 4\end{bmatrix} = 12 - 3 = \boxed{9} }\\ \\ \boxed{\begin{bmatrix}   -12 & - 1 \\ 12 & 5\end{bmatrix} = - 60- ( - 12) = \boxed{ - 48}} \\ \\ \boxed{\begin{bmatrix}  0& - 1 \\ 17 & 4\end{bmatrix} = 0 -( - 17 )= \boxed{17}} \\ \\\boxed{ \begin{bmatrix}  8& - 1 \\ - 4 & - 1\end{bmatrix} = - 8 - 4 = \boxed{ - 12} }\\ \\ \boxed{\begin{bmatrix}  2 & - 1 \\ 2 & - 1\end{bmatrix} = - 2 - ( - 2) = \boxed{0}} \\ \\ \boxed{ \begin{bmatrix}  1 & 0\\ 0 &1\end{bmatrix} = 1 - 0 = \boxed{1}}`

Explanation:

`the \: determinant \: of \: a \: matrix : A \to\\If \: A =\begin{bmatrix}  x & y \\ a & b \end{bmatrix} \: then : \\ its \: determinant \: is \: givn \: by \to \\ |A| = (b * x) - (a * y) \\ \boxed = bx - ax`

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