-8a(a+1)平方+2a的3次方
=2a[a²-4(a+1)²]【说明4(a+1)²=[2(a+1)]²】
=2a[a+2(a+1)][a-2(a+1)]
=2a(3a+2)(﹣a-2)
=﹣2a(3a+2)(a+2)
猜你喜欢
- 1小学语文升学夺冠训练a体系十一,古诗文名句背诵和默写的答案,急求,图片也行,快,
- 2已知△ABC是等边三角形边长AB=a求△ABC的面积(用含a的代数式表示)
- 32的2000次方 乘 (-0.5)2001次方
- 4请翻译:You might have given him more help,though you were busy.如题
- 5已知A={y|y2-(a2+a+1)y+a(a2+1)>0},B={y|y=1/2x2-x+5/2,0≤x≤3},若A∩B≠∮,求实数a的取值范围.
- 6If I were you I would marry her
- 7小明用9元买了6个练习本,小冬买同样的练习本10本花15元,因为( )一定,所以( )和( )成( )比例
- 8一本书小华读了全书的9分之2,小芳读了全书的6分之5,小华比小芳少读198页,这本书有多少页?
- 91、5、9、13、( )、21、( )、( )找规律
- 10our school is big and beautiful同义句