m-8 : m²-64 = m-8 . 15m² = (m-8) * 15m² = (m-8) * 3m = 3m
5m 15m² 5m m²-8² 5m * (m²-8²) (m-8)(m+8) m+8
m-8 : m²-64 = m-8 . 15m² = (m-8) * 15m² = (m-8) * 3m = 3m
5m 15m² 5m m²-8² 5m * (m²-8²) (m-8)(m+8) m+8