College Algebra CLEP Prep Practice Exam

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What is the sum of the roots of x^2 – 6x + 8 = 0?

  1. 0

  2. 2

  3. 4

  4. 6

The correct answer is: 4

The sum of the roots of a quadratic equation in the form ax^2 + bx + c = 0 is -b/a, where a and b are the coefficients of x^2 and x, respectively. In this equation, a = 1 and b = -6, so the sum of the roots is -(-6)/1 = 6. Both options A and B do not take into account the negative value of b, while option D disregards the coefficient of x^2. Therefore, option C is the correct answer.

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