16 Which quadratic equation has exactly one distinct real solution?
Correct answer: A (parsed from the explanation — this source omits an answer key for this item)
Explanation
+15 2=0 Choice A is correct. Taking the square root of both sides of ^x h yields +15=0 15 =-15 x . Subtracting from both sides of this equation yields x . Therefore, this equation has exactly one distinct real solution. Choice B is incorrect. This equation has no distinct real solutions, not exactly one distinct real solution. Choice C is incorrect. This equation has exactly two distinct real solutions, not exactly one distinct real solution. Choice D is incorrect. This equation has exactly two distinct real solutions, not exactly one distinct real solution.
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