2
Answer: ASet 3: Quadratic Equations (Intermediate)
Explanation
PROBLEM
Solve: x squared - 15x + 56 = 0. Find the larger root.
Solve: x squared - 15x + 56 = 0. Find the larger root.
A.✓ Correct
8
B.
6
C.
10
D.
7
Detailed Explanation
Choice A is the best answer. Factor: (x - 8)(x - 7) = 0. Roots are 8 and 7. Larger: 8
Why others are wrong:
B: 6 is incorrect because it does not satisfy the equation.
C: 10 is incorrect because it does not satisfy the equation.
D: 7 is incorrect because it does not satisfy the equation.