2m(m-n)^2-4n(n-m)^3 (分解因式)-7m(m-n)^3+21mn(n-m)^2 (分解因式)快
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2m(m-n)^2-4n(n-m)^3 (分解因式)-7m(m-n)^3+21mn(n-m)^2 (分解因式)快
2m(m-n)^2-4n(n-m)^3 (分解因式)
-7m(m-n)^3+21mn(n-m)^2 (分解因式)
快
2m(m-n)^2-4n(n-m)^3 (分解因式)-7m(m-n)^3+21mn(n-m)^2 (分解因式)快
2m(m-n)^2-4n(n-m)^3
=2m(m-n)^2+4n(m-n)^3
=2(m-n)^2[m+2n(m-n)]
-7m(m-n)^3+21mn(n-m)^2
=-7m(m-n)^3+21mn(m-n)^2
=-7m(m-n)^2(m-n+3n)
=-7m(m-n)^2(m+2n)
第一题
=4m²-4mn-12n²+12mn
=4m²-12n²+8mn
=4(m²-3n²+2mn)
=4(m+3n)(m-n)
第二题
[(m-n)^2*(m-n)^3]^2/(m-n)^4
[(m-n)^2*(m-n)^3]^2/(m-n)^4
4m(m-n)^2+4n(n-m)^3
(m-n)2(n-m)3(n-m)4化简
已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2=
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
(3m-4n)(4n+3m)-(2m-n)(2m+n)
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]
计算(m+4n)(m-n)-6(m+2n)(m-3n)
(m+4n)(m-n)-6(m+2n)(m-3n)
(m+4n)(m-n)-6(m+2n)(m-3n),
(1),(-m-n)(-m+n) (2),(-m+n)(m-n)
(m-2n)(-m-n)
2(m+n)2-(m+n)+4(m+n)-(m+n)2+3(m+n)2 化简求值
(m-n)(m^5+m^4n+m^3n^2+m²n^3+mn^4+n^5)
2(m+n)2²-(m+n)+4(m+n)-(m+n)²+3(m+n)² 计算
计算4(m+n)^2·(-m-n)^3-(m+n)(-m-n)^4+5(m+n)^5