# Math Help - plz find matrix satisfies these

1. ## plz find matrix satisfies these

2. Originally Posted by szpengchao
B = $\left[ \begin{array}{cc} 1 & -1 \\ 1 & 1 \end{array} \right]$

3. Hello,

$B=\begin{pmatrix} 0 & -1 \\ 1 & 0\end{pmatrix}$ would fit in too

For C, you just have to find a matrix whose determinant is 0.

4. $D=\begin{pmatrix} 0 & -1 \\ 1 & 0\end{pmatrix}$ too