Pg 633 (565) - Q13
Squaring a negative number makes the result positive. With this in mind, you can deduce that either x + 3 = x - 1, OR x + 3 = -(x - 1). Solving the first equation results in 0 = -4, which is nonsensical and can be disregarded. The second equation, however, yields the result that x = -1, so the statement is only true for x = -1 only, which is choice A.