sat suite question viewer
Advanced Math
/ Nonlinear equations in one variable and systems of equations in two variables
Difficulty: Easy
If 
, which of the following is a possible value of x ?
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Explanation
Choice D is correct. If 
, then taking the square root of each side of the equation gives 
or 
. Solving these equations for x gives 
or 
. Of these, 
is the only solution given as a choice.
Choice A is incorrect and may result from solving the equation 
and making a sign error. Choice B is incorrect and may result from solving the equation . Choice C is incorrect and may result from finding a possible value of 
.