A
B
C
D
Explanation
Correct answer: A.
Choice A is correct. Solving for by taking the square root of both sides of the given equation yields or . Of the choices given, satisfies the given equation.
Desmos solution:
Note: The restriction x < 0 isolates the negative square root, so the regression prints x = -8 as the solution.
Enter in Desmos:
Reviewed and rewritten by CookSAT
Why the other choices are wrong
Choice B
Choice B is incorrect and may result from a calculation error when solving for .
Choice C
Choice C is incorrect and may result from dividing by instead of taking the square root.
Choice D
Choice D is incorrect and may result from multiplying by instead of taking the square root.