{\displaystyle \left[{\begin{matrix}a_{1,1}&a_{1,2}&\cdots &a_{1,n}&b_{1}\\a_{2,1}&a_{2,2}&\cdots &a_{2,n}&b_{2}\\\vdots &\vdots &&\vdots &\vdots \\a_{m,1}&a_{m,2}&\cdots &a_{m,n}&b_{m}\end{matrix}}\right]}