OG详解-OG6 数学2 Q17

Choice D is correct. Since the square of a real number is never negative, the given equation isn’t true for any real value of ×. Therefore, the given equation has zero distinct real solutions.
Choice A is incorrect and may result from conceptual or calculation errors. Choice B is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors.