Question

equação geral da reta A(1,-2) e B(5,2)​

Answer 1

$\huge\mathsf{\begin{vmatrix}1&-2&1\\5&2&1\\x&y&1\end{vmatrix}=0}</p><p>$

$\mathsf{1(2-y)+2(5-x)+1(5y-2x)=0}\\\mathsf{2-y+10-2x+5y-2x=0}\\\mathsf{-4x+4y+12=0\div(-4)}$

$\huge\boxed{\boxed{\mathsf{x-y-3=0}}}$