Linear and Quadratic Equations
Q. What is the sum of the roots of the equation x^2 - 6x + 8 = 0?
Solution
The sum of the roots is given by -b/a = 6/1 = 6.
Correct Answer: A — 6
Q. What is the sum of the roots of the equation x^2 - 7x + 10 = 0?
Solution
The sum of the roots is given by -b/a = 7/1 = 7.
Correct Answer: B — 7
Q. What is the value of x in the equation x^2 - 2x - 8 = 0?
Solution
Factoring gives (x - 4)(x + 2) = 0, so x = 4 or x = -2.
Correct Answer: C — 4
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