Question

Can someone please help

Answer 1

`X=\left[\begin{array}{ccc}3&-1\\2&5\end{array}\right] \\Y=\left[\begin{array}{ccc}-2&4\\-3&1\end{array}\right]\\\\XY=\left[\begin{array}{ccc}3&-1\\2&5\end{array}\right]\cdot\left[\begin{array}{ccc}-2&4\\-3&1\end{array}\right]=\left[\begin{array}{ccc}(3)(-2)+(-1)(-3)&(3)(4)+(-1)(1)\\(2)(-2)+(5)(-3)&(2)(4)+(5)(1)\end{array}\right] \\\\=\left[\begin{array}{ccc}-6+3&12-1\\-4-15&8+5\end{array}\right] =\left[\begin{array}{ccc}-3&11\\-19&13\end{array}\right]`