Set 4: Quadratic Equations (Intermediate)

**Choice D is the best answer.** Sum of roots = -(-9)/1 = 9

Explanation

Answer: D

PROBLEM

For the equation x squared - 9x + 18 = 0, what is the sum of the roots?

✓ Correct

Detailed Explanation

Choice D is the best answer. Sum of roots = -(-9)/1 = 9

Why others are wrong:

A: 18 is incorrect because it does not satisfy the equation.

B: 7 is incorrect because it does not satisfy the equation.

C: 11 is incorrect because it does not satisfy the equation.