Compare x and y given two quadratics (use mapping below): I. x^2 − 7x + 12 = 0 II. y^2 − 12y + 32 = 0 Mapping: 1 → x > y, 2 → x < y, 3 → x = y, 4 → Relationship cannot be determined.
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Ax > y
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Bx < y
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Cx = y
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DRelationship cannot be determined
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Ex ≤ y
Answer
Correct Answer: Relationship cannot be determined
Explanation
Introduction / Context:Each variable is restricted by a quadratic with two possible roots. To decide a comparison between x and y, we must test all admissible combinations. If different admissible cases lead to different relations, then the overall comparison cannot be fixed.
Given Data / Assumptions:
- I: x^2 − 7x + 12 = 0
- II: y^2 − 12y + 32 = 0
Concept / Approach:Factor both quadratics. Enumerate all candidate values for x and y and compare. If at least one pair yields equality while another yields strict inequality, then a unique relation does not exist.
Step-by-Step Solution:I factors: (x − 3)(x − 4) ⇒ x ∈ {3, 4}II factors: (y − 4)(y − 8) ⇒ y ∈ {4, 8}Test combinations:x = 3 with y = 4 or 8 ⇒ x < yx = 4 with y = 4 ⇒ x = yx = 4 with y = 8 ⇒ x < y
Verification / Alternative check:Because both x = 4, y = 4 (equality) and x = 3, y = 4 (strict inequality x < y) are valid, there is no single definitive comparison valid for all admissible cases.
Why Other Options Are Wrong:“x > y”, “x < y”, and “x = y” each fail for at least one admissible pair.
Common Pitfalls:Choosing “x < y” based on one pair (e.g., 3 vs 8) and forgetting that equality also occurs (4 vs 4). All valid cases must be considered.
Final Answer:Relationship cannot be determined