#### Answer

-1

#### Work Step by Step

Since the coefficient of the squared term is one, we know that the expression must factor to:
$$ (x\pm a)(x\pm b)$$
Here, we see that a and b must multiply to get $1$ and add to get $2$. Thus, we find that the solution is:
$$(x+1)(x+1)$$
Thus, setting each factor equal to zero, we find that the solutions are:
$$-1$$