(2x+y)2xy-3x(2x+y)=

来源:百度知道 编辑:UC知道 时间:2024/06/16 02:37:10
还有15c(a-b)*2-10(b-a)*3=
分解因式(x+y+z)(x-y+z)-(y-x+z)(y-x-z)
x*2(a-x)(a-y)-y*2(x-a)(y-a)

1.(2x+y)2xy-3x(2x+y)
=x(2x+y)(2y-3)
2.15c(a-b)*2-10(b-a)*3
=5(a-b)²[3c-2(b-a)]
=5(a-b)²(3c-2b+2a)
3.(x+y+z)(x-y+z)-(y-x+z)(y-x-z)
=(x+z)²-y²-(y-x)²+z²
=[(x+z)²-(y-x)²]-(y²-z²)
=(y+z)(2x-y+z)-(y+z)(y-z)
=(y+z)(2x-y+z-y+z)
=(y+z)(2x-2y+2z)
=2(y+z)(x-y+z)
4.x*2(a-x)(a-y)-y*2(x-a)(y-a)
=(x-a)(y-a)(x²-y²)
=(x-a)(y-a)(x+y)(x-y).

2xy-3x