(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3(2a^2-3a+1)/(1-a^2)÷(4a^2-4a+1)/(2a^2+a-1)(3x+9)/(4-4x+x^2)÷(x+3)/(x-2)
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(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3(2a^2-3a+1)/(1-a^2)÷(4a^2-4a+1)/(2a^2+a-1)(3x+9)/(4-4x+x^2)÷(x+3)/(
(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3(2a^2-3a+1)/(1-a^2)÷(4a^2-4a+1)/(2a^2+a-1)(3x+9)/(4-4x+x^2)÷(x+3)/(x-2)
(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3
(2a^2-3a+1)/(1-a^2)÷(4a^2-4a+1)/(2a^2+a-1)
(3x+9)/(4-4x+x^2)÷(x+3)/(x-2)
(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3(2a^2-3a+1)/(1-a^2)÷(4a^2-4a+1)/(2a^2+a-1)(3x+9)/(4-4x+x^2)÷(x+3)/(x-2)
(a^2-9)/(a^2-4a+3)×(a-1)/a^2+4a+3
=[(a-3)(a+3)/(a-3)(a-1)×(a-1)/[(a+3)(a+1)]
=(a+3)/(a-1)×(a-1)/[(a+3)(a+1)]
=1/(a+1)
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
合并同类项:a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a+12a+……+2008a+2009a-2010a-2011a
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
a-2a+3a-4a+5a-6a+...+99a-100a
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+5a+.+2009a)-(2a+4a+6a+.2008a)
计算(a+3a+5a+...+2009a)-(2a+4a+6a+...+2010a)
(a+3a+5a+...+2013a)-(2a+4a+6a+...+2012a)=
化简:a-2a+3a-4a+5a-6a+.+2010a+2011a.
计算(a+3a+5a+.+2003a)-(2a+4a+6a+...+2004a)
(a+3a+5a+.+2003a)-(2a+4a+6a+.+2004a)
(a+3a+5a...+2009a)-(2a+4a+6a+...+2010a)=?
因式分解 9a(a-4)-6a(4-a)-3a(4-a)^2=
a(a-1)(a-2)(a-3)(a-4)因式分解
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a a=[ ]
a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a.+2008a+2009a-2010a-2011a如何合并同类项?
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?