（a-b）(m+n)(m-n)
a(a+1)(a-7)
(x+1)^2(x+1)(X-1)
同三
不会做（如果你愿意的话,等你会了能不能告诉我怎么解的?）
因式分解：（a-b)m²+(b-a)n²
因式分解：（a-b)m²+(b-a)n²
2.a³-6a²-7a 3.(x²+x)²-(x+1)² 4.(x²+x)²-(x+1)² 5.(x²-2)²+x-8
2.a³-6a²-7a 3.(x²+x)²-(x+1)² 4.(x²+x)²-(x+1)² 5.(x²-2)²+x-8
数学人气：231 ℃时间：2020-02-03 11:37:09
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