分组分解法:(1)5a²m+6abm-10a²n-12abn (2)x²-y²+2y-1(3)a²-b²-C²+2bc都是分组分解法
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![分组分解法:(1)5a²m+6abm-10a²n-12abn (2)x²-y²+2y-1(3)a²-b²-C²+2bc都是分组分解法](/uploads/image/z/10234465-25-5.jpg?t=%E5%88%86%E7%BB%84%E5%88%86%E8%A7%A3%E6%B3%95%EF%BC%9A%EF%BC%881%EF%BC%895a%26%23178%3Bm%2B6abm-10a%26%23178%3Bn-12abn+%EF%BC%882%EF%BC%89x%26%23178%3B-y%26%23178%3B%2B2y-1%EF%BC%883%EF%BC%89a%26%23178%3B-b%26%23178%3B-C%26%23178%3B%2B2bc%E9%83%BD%E6%98%AF%E5%88%86%E7%BB%84%E5%88%86%E8%A7%A3%E6%B3%95)
分组分解法:(1)5a²m+6abm-10a²n-12abn (2)x²-y²+2y-1(3)a²-b²-C²+2bc都是分组分解法
分组分解法:(1)5a²m+6abm-10a²n-12abn (2)x²-y²+2y-1
(3)a²-b²-C²+2bc
都是分组分解法
分组分解法:(1)5a²m+6abm-10a²n-12abn (2)x²-y²+2y-1(3)a²-b²-C²+2bc都是分组分解法
5a²m+6abm-10a²n-12abn
原式=5a²m-10a²n+6abm-12abn
=5a²﹙m-2n﹚+6ab﹙m-2n﹚
=a﹙5a-6b﹚﹙m-2n﹚
x²-y²+2y-1
原式=x²-﹙y²-2y+1﹚
=x²-﹙y-1﹚²
=﹙x-y+1﹚﹙x+y-1﹚
a²-b²-c²+2bc
原式=a²-﹙b²+c²-2bc﹚
=a²-﹙b-c﹚²
=﹙a+b-c﹚﹙a-b+c﹚