7
Answer: DSet 2: Quadratic Equations (Advanced)
Explanation
PROBLEM
Solve: x squared - 8x + 7 = 0. Find the larger root.
Solve: x squared - 8x + 7 = 0. Find the larger root.
A.
5
B.
8
C.
14
D.✓ Correct
7
Detailed Explanation
Choice D is the best answer. Factor: (x - 1)(x - 7) = 0. Roots are 1 and 7. Larger: 7
Why others are wrong:
A: 5 is incorrect because it does not satisfy the equation.
B: 8 is incorrect because it does not satisfy the equation.
C: 14 is incorrect because it does not satisfy the equation.