解几分解因式题要快啊!!

发布网友发布时间：2022-12-24 00:38

共5个回答

热心网友时间：2023-10-28 00:27

1.(3x+y)(3x-y)-(x+2y)(y-3x)
=(3x+y)(3x-y)+(x+2y)(3x-y)
=(3x-y)(3x+y+x+2y)
=(3x-y)(4x+3y)

2.a(a-b-c)+b(b+c-a)+c(c-a+b)
=a(a-b-c)-b(a-b-c)-c(a-b-c)
=(a-b-c)(a-b-c)
=(a-b-c)²

热心网友时间：2023-10-28 00:27

1.(3x+y)(3x-y)-(x+2y)(y-3x)
=(3x-y)(3x+y+x+2y)
=(3x-y)(4x+3y)

2.a(a-b-c)+b(b+c-a)+c(c-a+b)
=(a-b-c)(a-b-c)
=(a-b-c)²

热心网友时间：2023-10-28 00:27

1、 9x^2-y^2-(xy-3x^2+2y^2-6xy)=6x^2+5xy-3y^2
2、 a^2-ab-ac+b^2+bc-ab+c^2-ac+bc=a^2+b^2+c^2-2ab-2ac+2bc

热心网友时间：2023-10-28 00:28

1.(3x+y)(3x-y)-(x+2y)(y-3x)=(3x-y)(3x+y+x+2y)=(3x-y)(4x+3y)
2.a(a-b-c)+b(b+c-a)+c(c-a+b) =(a-b-c)(a-b-c)=(a-b-c)^2

热心网友时间：2023-10-28 00:29

1、(3x+y)(3x-y)-(x+2y)(y-3x)
=(3x+y)(3x-y)+(x+2y)(3x-y)
=(3x-y)(3x+y+x+2y)
=(3x-y)(4x+3y)
2.a(a-b-c)+b(b+c-a)+c(c-a+b)
=a(a-b-c)-b(a-b-c)-c(a-b-c)
=(a-b-c)(a-b-c)