ax^2 + x = a - 1
aX^2 - a = - x - 1
a( x^2 - 1) = - x - 1
x^2 - 1 = (x - 1)(x +1)
a(x - 1)(x +1) = -(X + 1)
a(x -1) = - 1
a = - 1 \ x - 1
ax^2 + x = a - 1
aX^2 - a = - x - 1
a( x^2 - 1) = - x - 1
x^2 - 1 = (x - 1)(x +1)
a(x - 1)(x +1) = -(X + 1)
a(x -1) = - 1
a = - 1 \ x - 1