用提取公因式法分解因式 1.2a²-6a³2.8ab²-16a³b³ 3.-15xy-5x² 4.-xy²+2x²y-xy 5.a³b³+a²b²-ab6.-3a³m-6a²m+12am7.(x+2y)²+x+2y8.15x(a-b)²-3y(b-a)
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![用提取公因式法分解因式 1.2a²-6a³2.8ab²-16a³b³ 3.-15xy-5x² 4.-xy²+2x²y-xy 5.a³b³+a²b²-ab6.-3a³m-6a²m+12am7.(x+2y)²+x+2y8.15x(a-b)²-3y(b-a)](/uploads/image/z/1850712-24-2.jpg?t=%E7%94%A8%E6%8F%90%E5%8F%96%E5%85%AC%E5%9B%A0%E5%BC%8F%E6%B3%95%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F+1.2a%26%23178%3B-6a%26%23179%3B2.8ab%26%23178%3B-16a%26%23179%3Bb%26%23179%3B+3.-15xy-5x%26%23178%3B+4.-xy%26%23178%3B%2B2x%26%23178%3By-xy+5.a%26%23179%3Bb%26%23179%3B%2Ba%26%23178%3Bb%26%23178%3B-ab6.-3a%26%23179%3Bm-6a%26%23178%3Bm%2B12am7.%EF%BC%88x%2B2y%EF%BC%89%26%23178%3B%2Bx%2B2y8.15x%EF%BC%88a-b%EF%BC%89%26%23178%3B-3y%EF%BC%88b-a%EF%BC%89)
用提取公因式法分解因式 1.2a²-6a³2.8ab²-16a³b³ 3.-15xy-5x² 4.-xy²+2x²y-xy 5.a³b³+a²b²-ab6.-3a³m-6a²m+12am7.(x+2y)²+x+2y8.15x(a-b)²-3y(b-a)
用提取公因式法分解因式
1.2a²-6a³
2.8ab²-16a³b³
3.-15xy-5x²
4.-xy²+2x²y-xy
5.a³b³+a²b²-ab
6.-3a³m-6a²m+12am
7.(x+2y)²+x+2y
8.15x(a-b)²-3y(b-a)
用提取公因式法分解因式 1.2a²-6a³2.8ab²-16a³b³ 3.-15xy-5x² 4.-xy²+2x²y-xy 5.a³b³+a²b²-ab6.-3a³m-6a²m+12am7.(x+2y)²+x+2y8.15x(a-b)²-3y(b-a)
1.2a²-6a³=2a²(1-3a)
2.8ab²-16a³b³= 8ab²(1-2a²b)
3.-15xy-5x² =-5x(x+3y)
4.-xy²+2x²y-xy =-xy(y-2x+1)
5.a³b³+a²b²-ab=ab(a²b²+ab-1)
6.-3a³m-6a²m+12am=-3am(a²+2a-4)
7.(x+2y)²+x+2y=(x+2y)²+(x+2y)=(x+2y)(x+2y+1)
8.15x(a-b)²-3y(b-a)=3(b-a)[5x(b-a)-y]=3(b-a)(5bx-5ax-y)