Question

(1,2) e (3,3), determine a equacão geral da reta ?​

Answer 1

$\Large\boxed{\begin{array}{l}\sf\begin{vmatrix}\sf1&\sf2&\sf1\\\sf3&\sf3&\sf1\\\sf x&\sf y&\sf1\end{vmatrix}=0\\\sf 1\cdot(3-y)-2\cdot(3-x)+1\cdot(3y-3x)=0\\\sf 3-y-6+2x+3y-3x=0\\\sf -x+2y-3=0\cdot(-1)\\\sf r: x-2y+3=0\end{array}}$