Let x be the greater real root of x^2 − 8x + 15 = 0 and y be the greater real root of y^2 − 3y + 2 = 0. Compare x and y.

Difficulty: Easy

Correct Answer: If x > y

Explanation:


Introduction / Context:
Both quadratics factor neatly. After identifying the larger root in each case, a simple comparison yields the correct relation between x and y.


Given Data / Assumptions:

  • x^2 − 8x + 15 = 0 ⇒ (x − 3)(x − 5) = 0 ⇒ greater x = 5.
  • y^2 − 3y + 2 = 0 ⇒ (y − 1)(y − 2) = 0 ⇒ greater y = 2.


Concept / Approach:
Factor, select the greater root, compare numerically.


Step-by-Step Solution:

x = 5; y = 2.Therefore x > y.


Verification / Alternative check:
The quadratic formula yields identical values; factoring is quickest.


Why Other Options Are Wrong:
They contradict the numerical ordering 5 > 2.


Common Pitfalls:
Accidentally picking the smaller root in either quadratic.


Final Answer:
If x > y

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