分解因式:2m^²-mn+2m+n-n^²,
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分解因式:2m^²-mn+2m+n-n^²,
分解因式:2m^²-mn+2m+n-n^²,
分解因式:2m^²-mn+2m+n-n^²,
原式=(2m²-mn-n²)+2m+n
=(2m+n)(m-n)+(2m+n)
=(2m+n)(m-n+1)
2m^²-mn+2m+n-n^²
=(2m²-mn-n²)+(2m+n)
=(m-n)(2m+n)+(2m+n)
=(2m+n)(m-n+1)
2m+n+(2m^2-mn-n^2)=2m+n+(2m+n)*(m-n)=(2m+n)*(m-n+1)