Set 4: Quadratic Equations (Intermediate)

[Variation 3] **Choice C is the best answer.** Factor: (x - 5)(x - 4) = 0. Roots are 5 and 4. Larger: 5

Explanation

Answer: C

PROBLEM

Researchers have observed 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 3] Choice C is the best answer. Factor: (x - 5)(x - 4) = 0. Roots are 5 and 4. Larger: 5

Why others are wrong:

A: 4 is incorrect because it does not satisfy the equation.

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

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