Question

Calcule a equação:

(x+1).(x-1)-2.(x-1)=(x-1)²-3.(x+1)

Answer 1

$x^{2}$ -1 -2x -2= $x^{2}$ +1 -2x -3x -3

-1 -2x -2=+1 -2x -3x -3
1 -2x = -5x
1=-3x
x = -1/3