Difficulty: Medium
Correct Answer: 2x^2 − 5x + 2 = 0
Explanation:
Introduction / Context:
Transforming roots often relies on expressing new symmetric sums in terms of the old. If α and β satisfy a known quadratic, we can compute α + β and αβ, then find (α/β) + (β/α) and (α/β)(β/α) to construct the desired equation.
Given Data / Assumptions:
Concept / Approach:
Compute sum and product of new roots: r1 + r2 = (α^2 + β^2)/(αβ) and r1*r2 = 1. Then use x^2 − (sum)x + (product) = 0 and clear denominators to get integer coefficients.
Step-by-Step Solution:
Verification / Alternative check:
Symmetry implies r1 and r2 are reciprocals; indeed product 1 confirms. Coefficients are integers after clearing denominators.
Why Other Options Are Wrong:
Common Pitfalls:
Miscomputing α^2 + β^2 or forgetting to divide by αβ. Ensure careful fraction arithmetic.
Final Answer:
Discussion & Comments