因式分解m²(m-1)-4(1-m²)
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因式分解m²(m-1)-4(1-m²)
因式分解m²(m-1)-4(1-m²)
因式分解m²(m-1)-4(1-m²)
=m²(m-1)+4(m+1)(m-1)
=(m-1)(m²+4m+4)
=(m-1)(m+2)²
m²(m-1)-4(1-m²)
=m²(m-1)+4(m²-1)
=m²(m-1)+4(m+1)(m-1)
=(m-1)【m²+4(m+1)】
=(m-1)【(m+1)²+2m】