1.m^3+2m^2-9m-18 2.(x+1)(x+3)(x+5)(x+7)-9因式分解

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1.m^3+2m^2-9m-18 2.(x+1)(x+3)(x+5)(x+7)-9因式分解
1.m^3+2m^2-9m-18 2.(x+1)(x+3)(x+5)(x+7)-9
因式分解

1.m^3+2m^2-9m-18 2.(x+1)(x+3)(x+5)(x+7)-9因式分解
1.m^3+2m^2-9m-18
=m^2(m+2)-9(m+2)
=(m+2)(m^2-3^2)
=(m+2)(m+3)(m-3)
2.(x+1)(x+3)(x+5)(x+7)-9
=[x^2+8x+7][(x^2+8x+7)+8]-9
=(x^2+8x+7)^2+8(x^2+8x+7)-9
=(x^2+8x+7+9)(x^2+8x+7-1)
=(x+4)^2(x^2+8x+6)

m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m求m的值 计算：m-2m-3m+4m-5m-6m+7m-8m-9m+...+2002m-2003m-2004m m-2m-3m+4m-5m-6m+7m-8m-9m+.+2002m-2003m-2004m 计算(m^2-9)/[m(m-3)+m-3] (1/m^2-3m)+(1/m^2-9m+18)+(1/m^2-15m+54)化简：(1/m^2-3m)+(1/m^2-9m+18)+(1/m^2-15m+54) 1/m(m+1)+1/(m+1)(m+2)+1/(m+2)(m+3)+.+1/(m+9)(m+10) 2m+3m+5m+7m+9m+…+2003m+2005m+2007m (m-3分之5m+m+3分之2m)*m分之m^2-9 化简：(m/m+3-2m/m+3)÷m/m^-9 计算：（m+3m+5m+...+2009m)-(2m+4m+6m+...+2008m) (m+3m+5m+...+2009m)-(2m+4m+6m+...2008m) (m+3m+5m+...+2014m)-(2m+4m+6m+...+2013m) (m+3m+5m+...+2013m)-(2m+4m+6m+...+2012m) (m+3m+5m+...+2015m)-(2m+4m+6m+...+2014m)= 计算:(m+3m+5m+...+2009m)-(2m+4m+6m+...+2010m) m-2m-3m+4m-5m-6m+7m.2004m=? (m+3m+5m.+2013m)-(2m+4m+6m+.+2012m)=? (m+3m+5m+...+2009m)-(2m+4m+...+2008m)怎么算