m²-n²+2m-2n
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
(m+2n)²+2(m+n)(2m-n)+(2m+n)² 因式分解
m-n分之m - m+n分之n + m²-n²分之2mn
证明(m+n)²/2+(m+n)/4≥(m√n)+(n√m)
计算m-n+[(2n²)/(m+n)]
化简(m²/m-n - m+n)÷2m²-mn/n - m
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
(m²-2m)²n+2n(m²-2m)+n
先化简再求值[(m+n)(m-n)-(m-n)²]÷(2n),其中m=-2,n=-1/2
(m+n)²-6(m+n)+9=(m+n)²+2(m+n)×(-3)+(-3)²=[(m+
2m(m²-n+1)计算