공통수학1 2025년 9월 모의고사 기출풀이｜2차방정식·2차함수 16·17·20·30번 완전해설

This video provides solutions to the previous questions from the September 2025 mock exam for Common Mathematics 1. This video covers questions 16, 17, 20, and 30 from the Quadratic Equations and Quadratic Functions section, covering the concepts, conditional interpretation, and calculation flow. In particular, ✔ Using the Discriminant and the Sum and Product of Two Roots (Question 16) ✔ Conditional Inference Problem for the Function Difference (f(x)−g(x)) (Question 17) ✔ Graph Interpretation + Interval Division Function (h(x)) Reasoning Problem (Question 20) ✔ Intersection Interpretation + Tangent Condition + Trapezoid Area Complete Analysis of the High-Difficulty Question 30 This video focuses on the following topics, allowing students to solve the problems independently. 📌 Recommended for: Students who need to review previous questions on Quadratic Functions in Common Math 1 Students who were stuck on the reasoning process for questions 20 and 30 in the September mock exam Students who are weaker at conditional interpretation than calculation 👉 If you feel like you "understood" the video, pause and try solving it again on your own. That will build your skills. #CommonMath1Instruction #SeptemberMockTestCommonMath #HanSeRyang #MathHanSeRyang #Studio115