1+n-m÷m²-n² --- ---- m+2n m²+4mn+4n²
m²n(m-n)-4mn(n-m)
1+n-m÷m²-n² --- ---- m+2n m²+4mn+4n²
1+n-m/m+2n÷m²-n²/m²+4mn+4n²=
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
化简(m²/m-n - m+n)÷2m²-mn/n - m
先化简(m/m-n-n/m+n+2mn/m²-n²)²÷m²+mn/m,若m=1
设m等于1/5n求 2n/(m+2n)+m/(2n-m)+4mn/(4n²-m²)
m-n分之m - m+n分之n + m²-n²分之2mn
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
规定新运算:m#n=m+n,m﹡n=m-n,试化简[(mn²﹚#(2mn)]+[(4mn²)﹡(3m
4-m²n²+2mn
已知m,n满足4m²+n²=5,mn=-1,求4m²-4mn+n²/2m+n除以