华容县公安局干部名单:几条因式分解,大家帮帮忙
来源:百度文库 编辑:高校问答 时间:2024/10/03 15:48:20
2.x^4-27x^2y^2+y^4
3.(x+2)(x+4)(x+6)(x+8)+16
4.x^4+1993x^2+1992x+1993
5.x^4+x^2y^2+y^4
6.(xy-1)^2+(x+y-2)(x+y-2xy)
帮我看一下对吗?
问题补充:-am^2-an=-a(m^2+n)
a^2+16b^2+8ab
=a^2+8ab+16b^2
=(a+4b)^2
2a^2 b -6ab^2
=2ab(a-3b)
x^2-2x+1
=(x-1)^2
=(2a-3)^2
x^4 y^2-2x^2 y-xy
=xy(x^3 y-2x-1)
4a^2-12a+9
=(2a)^2-12a+3^2
帮我看一下对吗?
问题补充:-am^2-an=-a(m^2+n)
a^2+16b^2+8ab
=a^2+8ab+16b^2
=(a+4b)^2
2a^2 b -6ab^2
=2ab(a-3b)
x^2-2x+1
=(x-1)^2
x^4 y^2-2x^2 y-xy
=xy(x^3 y-2x-1)
4a^2-12a+9
=(2a)^2-12a+3^2
=(2a-3)^2
x^2 y-4xy^2+4y^3
=y(x^2-4Xy+4y^2)
=y(x-2y)^2
错了的给你更正了!
a^2+16b^2+8ab
=a^2+8ab+16b^2
=(a+4b)^2
2a^2 b -6ab^2
=2ab(a-3b)
x^2-2x+1
=(x-1)^2
=(2a-3)^2
x^4 y^2-2x^2 y-xy
=xy(x^3 y-2x-1)
4a^2-12a+9
=(2a)^2-12a+3^2
帮我看一下对吗?
问题补充:-am^2-an=-a(m^2+n)
a^2+16b^2+8ab
=a^2+8ab+16b^2
=(a+4b)^2
2a^2 b -6ab^2
=2ab(a-3b)
x^2-2x+1
=(x-1)^2
x^4 y^2-2x^2 y-xy
=xy(x^3 y-2x-1)
4a^2-12a+9
=(2a)^2-12a+3^2
=(2a-3)^2
x^2 y-4xy^2+4y^3
=y(x^2-4Xy+4y^2)
=y(x-2y)^2