作业帮【1】4xb²-4a²b-b³ 【2】a³+2a²+a [3]4x²-20x+25
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/08 12:43:22
![【1】4xb²-4a²b-b³ 【2】a³+2a²+a [3]4x²-20x+25](/uploads/image/z/5489329-49-9.jpg?t=%E3%80%901%E3%80%914xb%26%23178%3B-4a%26%23178%3Bb-b%26%23179%3B+%E3%80%902%E3%80%91a%26%23179%3B%2B2a%26%23178%3B%2Ba+%5B3%5D4x%26%23178%3B-20x%2B25)
【1】4xb²-4a²b-b³ 【2】a³+2a²+a [3]4x²-20x+25
【1】4xb²-4a²b-b³ 【2】a³+2a²+a [3]4x²-20x+25
【1】4xb²-4a²b-b³ 【2】a³+2a²+a [3]4x²-20x+25
原式=-b(4a²-4ab+b²)
=-b(2a-b)²
原式=a(a²+2a+1)
=a(a+1)²
原式=(2x-5)²