3a(x-y)-(y-x) 因式分解
问题描述:
3a(x-y)-(y-x) 因式分解
答
=(x-y)(3a+1)
答
(3a+1)(x-y)
答
将-(y-x)变成+(x-y),因式3a(x-y)-(y-x)=3a(x-y)+(x-y)=(3a+1)(x-y)
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