6道因式分解(要过程)
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/11/10 17:12:22
6道因式分解(要过程)
1.(a²-b²)²+(a²+2b²)²
2.3a-12a²+18a³
3.(x+y)²(x-y)-(x+y)(x-y)²
4.x²y²-x²-y²+1
5.x²-2x-4y²-4y
6.(a²-2b²+4)(a²+2b²-4)
1.(a²-b²)²+(a²+2b²)²
2.3a-12a²+18a³
3.(x+y)²(x-y)-(x+y)(x-y)²
4.x²y²-x²-y²+1
5.x²-2x-4y²-4y
6.(a²-2b²+4)(a²+2b²-4)
1.(a²-b²)²+(a²+2b²)²
=2a^4+2a²b²+5b^4
=不能分解因式了
2.3a-12a²+18a³
=3a(1-4a+6a²)
3.(x+y)²(x-y)-(x+y)(x-y)²
=(x+y)(x-y)(x+y-x+y)
=2y(x+y)(x-y)
4.x²y²-x²-y²+1
=x²(y²-1)-(y²-1)
=(y²-1)(x²-1)
=(y+1)(y-1)(x+1)(x-1)
5.x²-2x-4y²-4y
=x²-4y²-2x-4y
=(x+2y)(x-2y)-2(x+2y)
=(x+2y)(x-2y-2)
6.(a²-2b²+4)(a²+2b²-4)
=2a^4+2a²b²+5b^4
=不能分解因式了
2.3a-12a²+18a³
=3a(1-4a+6a²)
3.(x+y)²(x-y)-(x+y)(x-y)²
=(x+y)(x-y)(x+y-x+y)
=2y(x+y)(x-y)
4.x²y²-x²-y²+1
=x²(y²-1)-(y²-1)
=(y²-1)(x²-1)
=(y+1)(y-1)(x+1)(x-1)
5.x²-2x-4y²-4y
=x²-4y²-2x-4y
=(x+2y)(x-2y)-2(x+2y)
=(x+2y)(x-2y-2)
6.(a²-2b²+4)(a²+2b²-4)