2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4化简并求值
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2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4化简并求值2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4化简并求值2m-{n+[4m-3(m+2n)+
2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4化简并求值
2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4
化简并求值
2m-{n+[4m-3(m+2n)+6m-5n}其中m=三分之二n=-4化简并求值
2m-{n+[4m-3(m+2n)+6m-5n}
=2m-n-4m+3m+6n-6m+5n
=-5m+10n
=-2/3x5-10x4
=-10/3-40
=-43又1/3
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),
[(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=
3m(m+n)-6(m^2-n^2)
4m(m-m)-2n(n-m)
(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]
(m-5n)(m-n)-6(m+2n)(m-3n)计算,要有过程
(m-5n)(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