因式分解:(a+1)^2-4(a+1)(a-1)+3(a-1)^2=_______拜托各位大神

问题描述:

因式分解:(a+1)^2-4(a+1)(a-1)+3(a-1)^2=_______拜托各位大神
因式分解:(a+1)^2-4(a+1)(a-1)+3(a-1)^2=_______快快!

(a+1)^2-4(a+1)(a-1)+3(a-1)^2 a+1 -3(a-1) a+1 -(a-1) =[a+1-3(a-1)][a+1-(a-1)] =(-2a+4)(2) =-4(a+2)