变形分式1/[3a(y-x)]=( )/12a(x^2-y^2)

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变形分式1/[3a(y-x)]=()/12a(x^2-y^2)变形分式1/[3a(y-x)]=()/12a(x^2-y^2)变形分式1/[3a(y-x)]=()/12a(x^2-y^2)括号里填-4(

变形分式1/[3a(y-x)]=( )/12a(x^2-y^2)
变形分式1/[3a(y-x)]=( )/12a(x^2-y^2)

变形分式1/[3a(y-x)]=( )/12a(x^2-y^2)
括号里填 -4(x+y)
可以把等式右边的分式的分母因式分解.