Question

把代數(shù)式ax²﹣4ax+4a分解因式，下列結(jié)果中正確的是（　�。�                     

A．a(chǎn)（x﹣2）²             B．a(chǎn)（x+2）²               C．a(chǎn)（x﹣4）²             D．a(chǎn)（x+2）（x﹣2）

Answer 1

A【考點(diǎn)】提公因式法與公式法的綜合運(yùn)用．                                          

【專題】因式分解．                                                                          

【分析】先提取公因式a，再利用完全平方公式分解即可．                            

【解答】解：ax²﹣4ax+4a，                                                                    

=a（x²﹣4x+4），                                                                              

=a（x﹣2）²．                                                                                   

故選：A．                                                                                         

【點(diǎn)評(píng)】本題先提取公因式，再利用完全平方公式分解，分解因式時(shí)一定要分解徹底．