Unit 7 • Class 10Compulsory Mathematics (Mat.101)
Quadratic Equation
वर्ग समीकरण
Standard form ax² + bx + c = 0, factorization method, completing the square, quadratic formula derivation, and applied word problems.
Lesson Summary & Key Concepts
Complete study notes on second-degree polynomial equations $ax^2 + bx + c = 0$, derivation of the standard quadratic formula by completing the square, discriminant analysis, and board exam word problems.
Quick Revision Takeaways
Common Exam Pitfalls to Avoid
⚠️ Common Error: Forgetting the ± symbol before the radical in the quadratic formula.
✓ Correct Approach: Write x = (-b ± √(b² - 4ac)) / (2a) with both plus and minus branches.
Why: Omitting ± yields only one root instead of both fundamental solutions.
Content Provenance & Verification
Editorial Verified & Published
Original Author / ContributorNEB Notes Nepal Academic Panel
Verified ByS. K. Adhikari (Senior Mathematics Faculty)
Curriculum Versionv1.0 (CDC 2078/2080 Grid)
Last Verified Date2026-10-23
Legitimate Official Curriculum References
public curriculum
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