作业帮 > 数学 > 作业

14x²+3x-27因式分解,2(x+y)²(x-y)-4(x+y)³

来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/11 14:04:25
14x²+3x-27因式分解,2(x+y)²(x-y)-4(x+y)³
还有(x²-2x)²+2(x²-2x)+1
14x²+3x-27
=(2x+3)(7x-9)
2(x+y)²(x-y)-4(x+y)³
=2(x+y)²[(x-y)-2(x+y)]
=2(x+y)²(x-y-2x-2y)
=2(x+y)²(-x-3y)
=-2(x+y)²(x+3y)
(x²-2x)²+2(x²-2x)+1
=(x²-2x+1)²
=(x-1)^4