Question Bank / Math / Nonlinear Equations

Nonlinear equations in one variable and systems of equations in two variables SAT question

Math · Advanced Math · Easy · Answer it here, explanation included.

If $open parenthesis, x plus 5, close parenthesis, squared, equals 4$ , which of the following is a possible value of x ?

ExplanationShow

Choice D is correct. If $open parenthesis, x plus 5, close parenthesis, squared, equals 4$ , then taking the square root of each side of the equation gives $x plus 5, equals 2$ or $x plus 5, equals negative 2$ . Solving these equations for x gives $x equals negative 3$ or $x equals negative 7$ . Of these, $negative 3$ is the only solution given as a choice.

Choice A is incorrect and may result from solving the equation $x plus 5, equals 4$ and making a sign error. Choice B is incorrect and may result from solving the equation $x plus 5, equals 4$ . Choice C is incorrect and may result from finding a possible value of $x plus 5$ .

Drill this skill on Aceit

Adaptive practice, a daily plan, and score tracking take a free account so we can save your work.

Practice this skill

Nonlinear equations in one variable and systems of equations in two variables SAT question

More Nonlinear equations in one variable and systems of equations in two variables questions