:16xyz-9 25(m+n+2)-16(m-n-2) 80a(
16(m+n)^2+40(m+n)(m-n)+25(m-n)^2 怎样因式分解?
已知m,n为正整数,且(16×2m-n)×(5m+n×25)=1000000,求3m+2n的值.
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
(3a^n-2)-6a^n+14a^n-1(因式分解) (m-n)^3+4(n-m)
16(3m-2n)²-25(m-n)²
1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/m^4+n^4)-8n^7/(m^8+n^8)-16
计算(3-m+n)*(3+m-n)-(2-m+n)*(2+m-n)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
-(m+n)^2+6(m+n)-9
(m-n)立方;+2n(n-m)平方
(m+n)(m-n)-(1-2n)化简