问题补充:
把多项式3m(x-y)-2(y-x)2分解因式的结果是A.(x-y)(3m-2x-2y)B.(x-y)(3m-2x+2y)C.(x-y)(3m+2x-2y)D.(y-x)(3m+2x-2y)
答案:
B
解析分析:根据互为相反数的两数的平方相等,把(y-x)2写成(x-y)2,然后提取公因式(x-y),整理即可.
解答:3m(x-y)-2(y-x)2,=3m(x-y)-2(x-y)2,=(x-y)(3m-2x+2y).故选B.
点评:本题主要考查提公因式法分解因式,转化为相同底数是求解的关键.
把多项式3m(x-y)-2(y-x)2分解因式的结果是A.(x-y)(3m-2x-2y)B.(x-y)(3m-2x+2y)C.(x-y)(3m+2x-2y)D.(y-
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