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Quadratic Equations

If the quadratic equation x^2 - 6x + 8 = 0 has roots r1 and r2, what is the sum of the roots?

Answer: A. 6
The sum of the roots of a quadratic equation ax^2 + bx + c = 0 is given by -b/a, which in this case is 6/1 = 6.
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