College Algebra CLEP Prep Practice Exam

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Prepare for the College Algebra CLEP Test with our comprehensive practice exam. Study with flashcards and multiple choice questions, each offering clues and detailed explanations. Achieve your best score and excel in your exam!

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Which of the following equations is NOT equal to the quadratic equation below?

x = 4
x = -4
x = 8
x = -8

The correct answer is: x = 4

To solve this equation, we need to isolate the variable x. First, we need to divide both sides of the equation by 2 to get x² = 8. Then, we can take the square root of both sides to eliminate the exponent and get x = ±√8. Finally, we can simplify √8 to get x ≈ ±2.83, which means that x can equal either 2.83 or -2.83. Since option C and D are both incorrect due to the fact that they do not include the ± sign and only give one value for x, we can eliminate them as possible answers. Option B can also be eliminated as multiplying -4 by itself does not equal 16. The only remaining option is A, which correctly represents the two possible solutions for x, 4 and -4. Therefore, A is the correct answer.