(5a-3a^2+1)-(4a^3-3a^2)-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
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(5a-3a^2+1)-(4a^3-3a^2)-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab](5a-3a^2+1)-(4a^3-3a^2)-2(ab-3a^2)-[2b^2-(5ab
(5a-3a^2+1)-(4a^3-3a^2)-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
(5a-3a^2+1)-(4a^3-3a^2)
-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
(5a-3a^2+1)-(4a^3-3a^2)-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
(5a-3a^2+1)-(4a^3-3a^2)=5a-3a^2+1-4a^3+3a^2=-4a^3+5a+1
-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]=-2ab+6a^2-[2b^2-5ab-a^2+2ab]=-2ab+6a^2-[2b^2-3ab-a^2]=-2ab+6a^2-2b^2+3ab+a^2=7a^2+ab-2b^2
(5a-3a^2+1)-(4a^3-3a^2)
=5a-3a²+1-4a³+3a²
=-4a³+5a+1
-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
=-2ab+6a²-2b²+5ab+a²-2ab
=7a²+ab-2b²已知：(a+2...
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(5a-3a^2+1)-(4a^3-3a^2)
=5a-3a²+1-4a³+3a²
=-4a³+5a+1
-2(ab-3a^2)-[2b^2-(5ab+a^2)+2ab]
=-2ab+6a²-2b²+5ab+a²-2ab
=7a²+ab-2b²
收起
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)=?
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=[ ]
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
因式分解：a+2/a+1-a+3/a+2-a-4/a-36+a-5/a-4