A方-B方+2B-1因式分解
问题描述：
A方-B方+2B-1因式分解
答
a²-b²+2b-1
=a²-(b²-2b+1)
=a²-(b-1)²
=(a+b-1)(a-b+1)
答
解
A²-B²+2B-1
=A²-(B²-2B+1)
=A²-(B-1)²
=[A-(B-1)][A+(B-1)]
=(A-B+1)(A+B-1)