Answer
Fill the blanks with
$-10,\ 2,\ -12,\ 0$
Work Step by Step
The product of a scalar $\mathrm{k}$ and a matrix $\mathrm{X}$ is the matrix $\mathrm{k}\mathrm{X}$, each of whose elements is $\mathrm{k}$ times the corresponding element of $\mathrm{X}.$
Thus, the LHS equals $\left[\begin{array}{ll}
-10 & 2\\
-12 & 0
\end{array}\right]$.
Two matrices are equal if they have the same dimension and if corresponding elements, position by position, are equal, so
$w=-10, x=2, y=-12, z=0.$
Fill the blanks with
$-10,\ 2,\ -12,\ 0$
