三次方的公式
来源:学生作业帮 编辑:搜搜考试网作业帮 分类:数学作业 时间:2024/07/04 14:42:04
![](http://img.wesiedu.com/upload/9/75/9758f4d2ef833fd0e4d0d0b74b5e361b.jpg)
![三次方的公式](/uploads/image/z/19471195-19-5.jpg?t=%E4%B8%89%E6%AC%A1%E6%96%B9%E7%9A%84%E5%85%AC%E5%BC%8F)
解题思路: 16x²-(x²+4)² =(4x+x²+4)[4x-(x²+4)] =(x+2)²(4x-x²-4) =(x+2)²×-(x²-4x+4) =-(x+2)²(x-2)²
解题过程:
解:1、2(1-x)2+6a(x-1)3
=2(x-1)2+6a(x-1)3
=2(x-1)²[1+3a(x-1)]
=2(x-1)²(3ax-3a+1) 2、 16x²-(x²+4)² =(4x+x²+4)[4x-(x²+4)]
=(x+2)²(4x-x²-4)
=(x+2)²【-(x²-4x+4)】
=-(x+2)²(x-2)²
解题过程:
解:1、2(1-x)2+6a(x-1)3
=2(x-1)2+6a(x-1)3
=2(x-1)²[1+3a(x-1)]
=2(x-1)²(3ax-3a+1) 2、 16x²-(x²+4)² =(4x+x²+4)[4x-(x²+4)]
=(x+2)²(4x-x²-4)
=(x+2)²【-(x²-4x+4)】
=-(x+2)²(x-2)²