(x-2x+1)(x-2x-1)
- 教育綜合
- 2023-01-23 07:56:09
(x2-2x-1)(x2+2x-1) 分解因式,要過(guò)程
(x2-2x-1)(x2+2x-1) =[(x-1)2-2]×[(x+1)2-2] =(x-1+√2﹚﹙x-1-√2﹚﹙x+1+√2﹚﹙x+1-√2﹚ a(a-1)-(a2-b)=﹣2 a2-a-a2+b=-2 a-b=2 ﹙a2+b2﹚÷2-ab =(a2-2ab+b2)÷2 =(a-b)2÷2 =22÷2 =2(2X-1)*(X-1)等于幾?
乘法分配律 原式=2X(X-1)-1×(X-1) =2X2-2X-X+1 =2X2-3X+1展開(kāi)全文閱讀
下一篇
返回列表