3a(x-y)-(y-x) 因式分解

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3a(x-y)-(y-x)因式分解3a(x-y)-(y-x)因式分解3a(x-y)-(y-x)因式分解将-(y-x)变成+(x-y),因式3a(x-y)-(y-x)=3a(x-y)+(x-y)=(3a

3a(x-y)-(y-x) 因式分解
3a(x-y)-(y-x) 因式分解

3a(x-y)-(y-x) 因式分解
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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(3a+1)(x-y)

=(x-y)(3a+1)