(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
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(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
(3a+2)(5a-2)+(1-4a)(a+4)=0 则a等于几
(3a+2)(5a-2)+(1-4a)(a+4)=0
15a²+4a-4-4a²-15a+4=0
11a²-11a=0
11a(a-1)=0
a=0,a=1
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
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)=?
2a*a+3a+2/a+1-a*a-a-5/a+2-3a*a-4a-5/a-2+2a*a-8a+5/a-3
化简后,求值:a×2a×3a×4a×5a×(a+2a+3a+4a+5a),其中a³=1/3
a+a^2+a^3+a^4+a^5+a^6...+a^n=a^n+1-a/a-1 (a-1)≠0
a(a-1)(a-2)(a-3)(a-4)因式分解
因式分解:a+2/a+1-a+3/a+2-a-4/a-36+a-5/a-4
当a=1时,a-2a+3a-4a+5a…+99a-100a=