SAT Math Multiple Choice Practice Question 564: Answer and Explanation

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Question: 564

21. If x2 - |5x| = -6, then what is one possible value of x ?

A. -5
B. -2
C. 0
D. 5
E. 6

Correct Answer: B

Explanation:

B Here is a chance to use Plugging In The Answers. Start with the middle value in C and see which makes the equation true: It is not possible for x to be 0, because 02 – |0| ≠ –6. The larger values don't equal –6 either: D gives 0 while E gives positive 6. B is correct: (–2)2 – |?10| = 4 – 10 = –6.

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