Question

因式分解,康桑密达

Answer 1

7.原式＝16m⁴+8m²+1-4m²

＝16m⁴+8m²-4m²+1

＝16m⁴+4m²+1

10.原式＝9m²-6mn+n²-（m²+6mn+9n²）

＝9m²-6mn+n²-m²-6mn-9n²

＝9m²-m²-6mn-6mn+n²-9n²

＝8m²-12mn-8²