因式分2(x-y)(x+y)-(x+y)2
题型:解答题难度:一般来源:不详
因式分2(x-y)(x+y)-(x+y)2 |
答案
2(x-y)(x+y)-(x+y)2, =(x+y)[2(x-y)-(x+y)], =(x+y)(x-3y). |
举一反三
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