(1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2=

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(1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2=
xՑN0_]68-<#R$E${@;! W"MW+ ݟyΜx pp)𓮾*$(dPW?5OQaYPdE}Pf

(1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2=
(1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4
(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=
(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=
(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2=

(1)(m+n)^3+2m(m+n)^2+m^2(m+n)= (2)[（x-2y)(x+2y)+4(1)(m+n)^3+2m(m+n)^2+m^2(m+n)=(2)[（x-2y)(x+2y)+4(x-y)^2］除以5x=(3)1.2345^2+(0.7655)^2+2.469乘0.7655-2.5^2=
1,原式=（m+n）（m2+n2+2mn+2m2+2mn+
m2）=（m+n）（4m2+n2+4mn）=（m+n）（2m+n）^2
2,x-8/5y（感觉意义不明）
3,原式=（1.2345+0.7655)^2(-2*1.2345*0.7655+2.469*0.7655)-2.5^2.(PS 2*1.2345=2.469)
故=2^2-2.5^2=-9/4

(1),(-m-n)(-m+n) (2),(-m+n)(m-n) [(m-n)^2*(m-n)^3]^2/(m-n)^4 [(m-n)^2*(m-n)^3]^2/(m-n)^4 3m(m-n)-2n(m-n)的平方 因式分解(n-m)^3(m-n)^2-(m-n)^5 （m-n)2(n-m)3(n-m)4化简 （n-m)^3×(m-n)^2-(m-n)^5 计算(m+n)^3-(n+m)(m-n)^2 (m-n)^3(n-m)^2(m-n)=_____ 4m(m-n)^2+4n(n-m)^3 (m-2n)(-m-n) 2m-3n-m+2n (m-n)3-(2n-m)3 (3m-n)(m-2n)=() (m+2n)(m-3n) (m-3n)(2m+n) 约分(m-n)^2/(n-m)^3 因式分解m^2-(n+1)m+n