(2a+1)(a-3)-(a-6)(2a+7)+45怎么算
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(2a+1)(a-3)-(a-6)(2a+7)+45怎么算
(2a+1)(a-3)-(a-6)(2a+7)+45怎么算
(2a+1)(a-3)-(a-6)(2a+7)+45怎么算
(2a+1)(a-3)-(a-6)(2a+7)+45
=2a^2-5a-3-2a^2+5a+42+45
=-3+42+45
=84
(2a+1)(a-3)-(a-6)(2a+7)+45
=(2a+1)(a-3)-(a-6)(2a+1+6)+45
=(2a+1)(a-3)-(a-6)(2a+1)-6a+36+45
=(2a+1)*3-3*(2a-27)
=28*3
=84
(2a+1)(a-3)-(a-6)(2a+7)+45
=(2a+1)(a-3)-(2a+1+6)(a-3-3)+45
=(2a+1)(a-3)-(2a+1)(a-3)+3(2a+1)-6(a-3)+18+45
=(2a+1)(a-3)-(2a+1)(a-3)+6a-6a+3+18+18+45
=84
(通分) a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
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)=?
计算(a+1)(a+2)(a+3)(a-6)
a(a-1)(a-2)(a-3)(a-4)因式分解
a-1/a+2÷a²-2a+1/a²-4×a+3/a²+a-6