Matching Pairs Identities and FactorizationOnline version Matching Terms Activity for Consolidation by Gavin Ip 1 Taking Out Common Factors 2 Expansion 3 Equation 4 Grouping 5 Factorization 6 Prove 7 Check whether 8 Identity 展開 併項 恆等式 抽取共同因子 因式分解 公式 証明 驗証