9
Answer: CSet 3: Quadratic Equations (Intermediate)
Explanation
PROBLEM
For the equation x squared - 4x + 4 = 0, what is the sum of the roots?
For the equation x squared - 4x + 4 = 0, what is the sum of the roots?
A.
6
B.
2
C.✓ Correct
4
D.
3
Detailed Explanation
Choice C is the best answer. Sum of roots = -(-4)/1 = 4
Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
B: 2 is incorrect because it does not satisfy the equation.
D: 3 is incorrect because it does not satisfy the equation.