Enhance algebra 04 polynomial roots with MathWorld educational cross-references

[AronT-TLV]

Summary:

Adds strategic MathWorld educational cross-references to the "Finding Polynomial Roots and Zeros" document, following the successful methodology used for algebra 02 and 03 enhancements.

Changes Made:

• 9 verified MathWorld links added for core polynomial concepts:

• Polynomial roots, polynomial definitions, factor theorem
• Remainder theorem, multiplicity of roots theory
• Fundamental theorem of algebra, rational root theorem
• Synthetic division and polynomial factorization methods

• Quality assurance:

• Every MathWorld link verified via fetch_webpage calls
• Document structure and practical focus maintained
• No disruption to existing mathematical content or examples
• Strategic placement at key theoretical concept introductions

• Educational value:

• Enhanced theoretical foundation for polynomial root-finding
• Provides authoritative mathematical references for fundamental theorems
• Bridges practical methods with underlying mathematical theory
• Enables deeper learning pathways for students

Testing:

• Documentation builds successfully with LiveServer
• Git diff reviewed for clean, focused changes
• All 9 enhancements verified and tested

Methodology:
Follows proven approach from algebra 02 and 03 document enhancements, maintaining consistency across mathematical documentation while significantly improving educational accessibility and theoretical depth.