(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)化简,
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)÷(2m-3n)化简,
(m²-6mn+9n²)÷(m-3n)-(4m²-9n²)-(2m-3n)怎么做
计算 m+n/m²-mn÷(m+n)×(m²-n²)
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
mn(m-n)²-n(n-m)³=n(m-n)²( )
化简(m²/m-n - m+n)÷2m²-mn/n - m
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
先化简再求值:(2m-n)(m+n)+(m-n)²-(6m³-4m²n)÷2m,其中m=2
设m等于1/5n求 2n/(m+2n)+m/(2n-m)+4mn/(4n²-m²)
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
化简-3(m-n)²-(m-n)平方-3(m-n)+4m-n)的平方+2(m-n)-1
m²n(m-n)-4mn(n-m)