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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What is the discriminant of the equation x2 - 10x + 21 = 0?

The correct answer is: 100

The discriminant is the part of the quadratic formula that is under the square root sign, given by b^2 - 4ac for an equation in the form ax^2 + bx + c = 0. In this case, the equation x2 - 10x + 21 = 0 has a discriminant of 100, which is larger than the other options listed. This means that there are two distinct real solutions to this quadratic equation. Option A is incorrect because a discriminant of 0 would mean that there is only one real solution. Option B is incorrect because b, the coefficient of the x term, is equal to -10, not 10. Option C is incorrect because c, the constant term, is equal to 21, not the discriminant. Therefore, option D, with a discriminant of 100, is the correct answer.