因式分解-4x³y+4x²y²-xy³还有一个:(m+n)²-4(m+n-1)
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因式分解-4x³y+4x²y²-xy³还有一个:(m+n)²-4(m+n-1)
因式分解-4x³y+4x²y²-xy³
还有一个:(m+n)²-4(m+n-1)
因式分解-4x³y+4x²y²-xy³还有一个:(m+n)²-4(m+n-1)
-4x³y+4x²y²-xy³
=-xy(4x^2-4xy+y^2)
=-xy(2x-y)^2
-xy(4x²-4xy+y²)= -xy(2x-y)²