Set 3: Quadratic Equations (Advanced)

[Variation 1] **Choice D is the best answer.** Factor: (x - 4)(x - 5) = 0. Roots are 4 and 5. Larger: 5

Explanation

Answer: D

PROBLEM

Recent studies show that solve: x squared - 9x + 20 = 0. Find the larger root.

Solve: x squared - 9x + 20 = 0. Find the larger root.

✓ Correct

Detailed Explanation

[Variation 1] Choice D is the best answer. Factor: (x - 4)(x - 5) = 0. Roots are 4 and 5. Larger: 5

Why others are wrong:

A: 10 is incorrect because it does not satisfy the equation.

B: 6 is incorrect because it does not satisfy the equation.

C: 3 is incorrect because it does not satisfy the equation.