we must locate the corner points of the original triangle and apply the transformation for each one
[tex]L(4,-1)\longrightarrow L^{\prime}(4-4,-1+5)\longrightarrow L(0,4)[/tex][tex]M(6,-2)\longrightarrow M^{\prime}(6-4,-2+5)\longrightarrow M^{\prime}(2,3)[/tex][tex]N(3,-3)\longrightarrow N^{\prime}(3-4,-3+5)\longrightarrow N^{\prime}(-1,2)[/tex]