Answers for "matrix in overleaf"

matrix latex

begin{bmatrix}
1 & 2 & 3 \
a & b & c \
a & b & c \
end{bmatrix}

augmented matrix in overleaf

$$
begin{bmatrix}
    1 & 0 & 0 & 0 &bigm| & 0 \
    0 & 1 & 0 & 0 &bigm| & 5 \
    0 & 0 & 1 & 0 &bigm| & -4 \ 
    0 & 0 & 0 & 1 &bigm| & -2
end{bmatrix}
$$

matrix latex

begin{equation*}
A_{m,n} = 
begin{pmatrix}
a_{1,1} & a_{1,2} & cdots & a_{1,n} \
a_{2,1} & a_{2,2} & cdots & a_{2,n} \
vdots  & vdots  & ddots & vdots  \
a_{m,1} & a_{m,2} & cdots & a_{m,n} 
end{pmatrix}
end{equation*}

how to make matrix latex

documentclass{article}
usepackage[utf8]{inputenc}
usepackage{amsmath}
begin{document}
$$
begin{bmatrix} 
a & b & c \
c & d & d\
e & f & g \
end{bmatrix}
quad
$$
end{document}