PSAT Math Multiple-Choice Question 451: Answer and Explanation
Question: 451
Which of the following is equivalent to x2 + 4x + 16 = 0?
- A.
- B.
- C.
- D.
Correct Answer: D
Explanation:
D
Difficulty: Medium
Getting to the Answer: Since the first term has a constant of 1, completing the square can be used right away. Make sure to move the constant term to the right side of the equation before dividing the x term constant by 2 and squaring:
Therefore, (D) is correct.
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