- 试题详情及答案解析
- (2014•台湾)(3x+2)(﹣x6+3x5)+(3x+2)(﹣2x6+x5)+(x+1)(3x6﹣4x5)与下列哪一个式子相同?( )
A.(3x6﹣4x5)(2x+1) | B.(3x6﹣4x5)(2x+3) |
C.﹣(3x6﹣4x5)(2x+1) | D.﹣(3x6﹣4x5)(2x+3) |
- 答案:C
- 试题分析:首先把前两项提取公因式(3x+2),再进一步提取公因式﹣(3x6﹣4x5)即可.
解:原式=(3x+2)(﹣x6+3x5﹣2x6+x5)+(x+1)(3x6﹣4x5)
=(3x+2)(﹣3x6+4x5)+(x+1)(3x6﹣4x5)
=﹣(3x6﹣4x5)(3x+2﹣x﹣1)
=﹣(3x6﹣4x5)(2x+1).
故选:C.
点评:此题主要考查了因式分解,关键是正确找出公因式,进行分解.