2n+(7n-3m)-4(n-2m),化简代数式,
2n+(7n-3m)-4(n-2m),化简代数式,
化简求值,已知m-n=-3,求代数式-(m-n)的平方-2(m-4)+2(6+n)
已知m=5 4/7,n=4 3/7, 求代数式[-7/2(m+n)]^3×(m-n)×[-2(m+n)(m-n)]^2的
2(m+n)2-(m+n)+4(m+n)-(m+n)2+3(m+n)2 化简求值
化简代数式:(m^2+n^2/m^2-n^2)+2mn/(m+n)^2(m-n)
函数y=(m-3)x+n-2的图象如图所示,化简代数式:|m-n|-(根号n²-4n+4)-|m-1|
已知:(m+n)^2=7,(m-n)^2=3,求代数式m^4+n^4的值
若m-n=3,3m+2n=2,求代数式6m(m-n)-4n(n-m)的值
计算或化简 (3m-n)(-3m-n)-(m-2n)^2-(m-2n)(2m-n)
计算1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/(m^4+n^4)-8n^7/(m^8+n^8)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
(m-n)2(n-m)3(n-m)4化简