3a+(-5a+2)-(4-3a) .,.
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3a+(-5a+2)-(4-3a) .,.
3a+(-5a+2)-(4-3a) .,.
3a+(-5a+2)-(4-3a) .,.
3a+(-5a+2)-(4-3a)
=3a-5a+2-4+3a
=a-2,如正确,望楼主及时采纳,谢谢你的支持!
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+a+5+a+6+a+7.+a+2013+a+2014=?
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
(5A+2A-3-4A)-(-A+3A-A)其中A=-2
5a-【a+(5a-2a)-2(a-3a)-4a】
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
2a+(4a-5a)-3(a-2b)
(a-2)(a-3)+5a-4a求步骤
2a*a+3a+2/a+1-a*a-a-5/a+2-3a*a-4a-5/a-2+2a*a-8a+5/a-3