m立方-2m平方-4m 8
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∵m²+m-1=0∴m²=1-m2m³+4m²+2005=(2m³+2m²)+2m²+2005=2m²(m+1)+2m&
m的平方+2m-1=0m的平方+2m=1两边同乘以4m得4m^3+8m^24m4m^3=4m-8m^24m的立方+10m的2次方-15=4m-8m^2+10m^2-15=2m^2+4m-15=2(m^
立方转换 1:1000 2立方米=2000立方dm
m的立方-2m的平方n+mn的平方-4m的平方+4mn+4m=m(m^2-2mn+n^2-4m+4n+4)=m((m-n)^2-4(m-n)+4)=m(m-n-2)^2
m+m²-2m³=-m(2m²-m-1)=-m((m-1)(2m+!)
m³+2m²+2007=m﹙m²+m﹚+m²+2007=m+m²+2007=1+2007=2008
2m²-m-4=0∴2m²-m=48m³-10m²-13m+17=4m(m²-m)-6m²-13m+17=16m-6m²-13m+
m²+m-1=0 m²=1-m m³+2m²+2012 =m³+2m²+2012 =m(1-m)+2m²+2012 =m
(m+n)^3+2m(m+n)^2+m^2(m+n)=(m+n)((m+n)^2+2m(m+n)+m^2)=(m+n)(m+n+m)^2=(m+n)(2m+n)^2(a^2+b^2)^2-4a^2b^
原式=(m-n)³+2n(m-n)²=(m-n)²[(m-n)+2n]=(m-n)²(m+n)
很简单啊,合并相同的项:原式=-m^3+0m^2-2m=-m^3-2m带入m的值结果1-(-2)=3
m^2+m-1=0得到m^2+m=12m^3+4m^2+2006=2m(m^2+m)+2m^2+2006=2m+2m^2+2006=2(m^2+m)+2006=2008
m^2+m=1m^3+2m^2+2008m^2+m+m=1+m=m(m^2+2m)+2008m^2+2m=1+m=m(1+m)+2008=m^2+m+2008=1+2008=2009
64-16a+a²=(8-a)²m³n-2m²n²+mn³=mn(m²-2mn+n²)=mn(m-n)²
(3m³-4m²+m)/m-n=[m(3m²-4m+1)]/m-n=3m²-4m+1-n
m^2+m-1=0→m^2+m=1m^3+2m^2+2007=m^3+m^2+m^2+2007=m(m^2+m)+m^2+2007=m+m^2+2007=2008
[(3m)立方]平方×m+[(-4m)的平方)]的立方=[27m三方]平方×m+[16m平方]的立方=54m六次方+256m五次方
-(1/3+m的平方n+m的立方)-(2/3-m的平方n-m的立方)=-m^3-m²n-1/3+m^3+m²n-2/3=-1/3-2/3=-1
8m平方n四次方×(-4n立方分之3m)÷(-2分之m平方n)=-6m³n÷(-m²n/2)=3m如果本题有什么不明白可以追问,