91Ó°ÊÓ

Since, an ordered pair is represented by a column matrix and triangle has 3 ordered pair on vertices so required matrix has 2 rows and 3 columns.

If the matrix is translated to x units right or left then xis added or subtracted from first row respectively.

If the matrix is translated to y units up or down then y is added or subtracted from second row respectively.

Thus translation matrix is of the form

Coordinates of $\mathrm{Δ}ABC$are $A\left(-2,3\right),B\left(4,0\right),\text{and}C\left(2,-5\right)$, so its vertex matrix is

Again, Coordinates of $\mathrm{Δ}A\text{'}B\text{'}C\text{'}$are $A\text{'}\left(-5,1\right),B\text{'}\left(1,-2\right),\text{and}C\text{'}\left(-1,-7\right)$, so its vertex matrix is

When translation occurs, sum of vertex matrix of pre-image and translated matrix gives vertex matrix of image as shown below

$\begin{array}{c}\left[\begin{array}{ccc}−2& 4& 2\\ 3& 0& −5\end{array}\right]+\left[\begin{array}{ccc}x& x& x\\ y& y& y\end{array}\right]=\left[\begin{array}{ccc}−5& 1& −1\\ 1& −2& −7\end{array}\right]\\ \left[\begin{array}{ccc}−2+x& 4+x& 2+x\\ 3+y& 0+y& −5+y\end{array}\right]=\left[\begin{array}{ccc}−5& 1& −1\\ 1& −2& −7\end{array}\right]\end{array}$

As elements of both matrices are equal find values of x and y

$\begin{array}{c}−2+x=−5\\ x=−5+2\\ x=−3\end{array}$ and $\begin{array}{c}3+y=1\\ y=1−3\\ y=−2\end{array}$

Thus, translated matrix is

$\left[\begin{array}{ccc}−3& −3& −3\\ −2& −2& −2\end{array}\right]$