Canonical URI: https://w3id.org/kmath/textbook_solution/ybm_solution_p138_p030_01
| rdf:type | math:TextbookSolution |
|---|---|
| rdfs:label | YBM p138 해설 - p030 마무리 15 |
| rdfs:comment | YBM 공통수학1 정답과 해설 p138의 서술형 풀이 원문. |
| math:answerText | \(4ab\) |
| math:explanationText | 15 \[ (a+b+c)(a+b-c)+(a-b+c)(-a+b+c) \] \[ =\{(a+b)+c\}\{(a+b)-c\}+\{c+(a-b)\}\{c-(a-b)\}\quad \text{▶ 25 \%} \] \[ =(a+b)^2-c^2+c^2-(a-b)^2\quad \text{▶ 25 \%} \] \[ =(a^2+2ab+b^2)-(a^2-2ab+b^2)=4ab\quad \text{▶ 50 \%} \] |
| math:mappingConfidence | 0.94 |
| math:pageStart | 138 |
| math:problem | textbook_problem:ybm_vision_p030_01 |
| math:reviewStatus | reviewed |
| math:solutionKind | worked_solution |
| math:usesSolutionPattern | solution_pattern:combine_like_terms_polynomial |
| math:usesSolutionPattern | solution_pattern:expand_with_formula |