因式分解:(1)-x^2+2x-1(2)m^2-n^2+2m-2n
因式分解m^2-(n+1)m+n
因式分解4-(2x-1)² (2m-n)²-121(m+n)²
因式分解(m-n)^2-1
(m+n)²+2(m+n)+1因式分解,
(m-n)(m-n+2)-6因式分解
因式分解m²+2m(m-n)+(m-n)²,16-8(x-y)+(x-y)²
1因式分解5m^2n-20m^n
计算:(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4
因式分解1)-4x^2+1 2)(m^2+n^2)^2-4m^2n^2
因式分解4m^2(m-n)+4n(n-m)
因式分解(n-m)^3(m-n)^2-(m-n)^5
因式分解:x^2-(m^2+n^2)x+mn(m^2-n^2)