-3(3a^2-4)-(a^2-3a+5)+(4a-a^2),a=-3化简求值
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-3(3a^2-4)-(a^2-3a+5)+(4a-a^2),a=-3化简求值
-3(3a^2-4)-(a^2-3a+5)+(4a-a^2),a=-3
化简求值
-3(3a^2-4)-(a^2-3a+5)+(4a-a^2),a=-3化简求值
解-3(3a^2-4)-(a^2-3a+5)+(4a-a^2)
=-9a²+12-a²+3a-5+4a-a²
=-11a²+7a+7
=-11×(-3)²+7(-3)+7
=-99-21+7
=-113
-3(3a^2-4)-(a^2-3a+5)+(4a-a^2)
=﹣9a²+12-a²+3a-5+4a-a²
=﹣11a²+7a+7
当a=﹣3时,
原式=﹣11a²+7a+7
=﹣99-21+7
=﹣113.
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
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
5a^-〔a^-2a-2(a^-3a)]
a(a-1)(a-2)(a-3)(a-4)因式分解