関連ワード:  factorization method class 9    factoring method grade 9    prime factorization method class 9    factor theorem method class 9    factorization by division method class 9    hcf by factorization method class 9    lcm by factorization method class 9    square root by factorization method class 9    what is the factorization method    how to do factorisation class 9