3
Answer: CSet 1: Quadratic Equations (Advanced)
Explanation
PROBLEM
Solve: x squared - 9x + 20 = 0. Find the larger root.
Solve: x squared - 9x + 20 = 0. Find the larger root.
A.
3
B.
6
C.✓ Correct
5
D.
4
Detailed Explanation
Choice C is the best answer. Factor: (x - 5)(x - 4) = 0. Roots are 5 and 4. Larger: 5
Why others are wrong:
A: 3 is incorrect because it does not satisfy the equation.
B: 6 is incorrect because it does not satisfy the equation.
D: 4 is incorrect because it does not satisfy the equation.