Question

Determine a equação de reta na forma geral que passa pelos pontos: A( -2, 1 ) e B( 0, 1 )

Answer 1

$\huge\mathtt{\begin{vmatrix}-2&1&1\\0&1&1\\x&y&1\end{vmatrix}=0}$

$\mathtt{-2(1-y) -1(-x)+1(-x)=0}$

$\mathtt{-2+2y+x-x=0\div2}$

$\mathtt{0x+y-1=0}$