把6(x-y)-3y(y-x)因式分解结果是什么( )过程也要A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)2.下列分解因式中错误的是( )A.1-9x²=(1+3x)(1-3x)
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![把6(x-y)-3y(y-x)因式分解结果是什么( )过程也要A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)2.下列分解因式中错误的是( )A.1-9x²=(1+3x)(1-3x)](/uploads/image/z/5368725-45-5.jpg?t=%E6%8A%8A6%EF%BC%88x-y%EF%BC%89-3y%EF%BC%88y-x%EF%BC%89%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%BB%93%E6%9E%9C%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%88++++%EF%BC%89%E8%BF%87%E7%A8%8B%E4%B9%9F%E8%A6%81A.%EF%BC%88x-y%EF%BC%89%EF%BC%886%2B3y%EF%BC%89+++B.3%EF%BC%88y-x%EF%BC%89%EF%BC%88y%2B2%EF%BC%89+++++C.3%EF%BC%88x-y%EF%BC%89%EF%BC%882-y%EF%BC%89++D.3%EF%BC%88x-y%EF%BC%89%EF%BC%88y%2B2%EF%BC%892.%E4%B8%8B%E5%88%97%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E4%B8%AD%E9%94%99%E8%AF%AF%E7%9A%84%E6%98%AF%EF%BC%88+++%EF%BC%89A.1-9x%26%23178%3B%3D%EF%BC%881%2B3x%EF%BC%89%EF%BC%881-3x%EF%BC%89)
把6(x-y)-3y(y-x)因式分解结果是什么( )过程也要A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)2.下列分解因式中错误的是( )A.1-9x²=(1+3x)(1-3x)
把6(x-y)-3y(y-x)因式分解结果是什么( )过程也要
A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)
2.下列分解因式中错误的是( )
A.1-9x²=(1+3x)(1-3x) B.a(x-y)-bx+by=(x-y)(a-b)
C.4a²-3b(4a-3b)=(2a-3b)² D.(x-1)(x-3)+1=(x+2)²
把6(x-y)-3y(y-x)因式分解结果是什么( )过程也要A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)2.下列分解因式中错误的是( )A.1-9x²=(1+3x)(1-3x)
把6(x-y)-3y(y-x)因式分解结( A
A.(x-y)(6+3y) B.3(y-x)(y+2) C.3(x-y)(2-y) D.3(x-y)(y+2)
6(x-y)-3y(y-x)
=6(x-y)+3y(x-y)
=(x-y)(6+3y)
2.下列分解因式错误( D )
A.1-9x²=(1+3x)(1-3x) B.a(x-y)-bx+by=(x-y)(a-b)
C.4a²-3b(4a-3b)=(2a-3b)² D.(x-1)(x-3)+1=(x+2)²
(x-1)(x-3)+1
=x²-4x+3+1
=x²-4x+4
=(x-2)²≠(x+2)²
设服装涨价x元
每件利润=每件售价-每件进价,全部利润=每件利润*售出件数
则每件利润=50+x-40,售出件数=500-10x
(50+x-40)(500-10x)=800
接下来就自己算啦
x1=10,x2=30(舍去)
求采纳为满意回答。
1,=6(x-y)+3y(x-y)
=(x-y)(6+3y)
答案A
2,D,明显平方不能化成.(x-1)(x-3)格式。
1、选【D】 原式=6(x-y)+3y(x-y) =3(x-y)(2+y) 2、选【D】
1、6(x-y)-3y(y-x)
=6(x-y)+3y(x-y)
=(6+3y)(x-y)
所以应该选A
2、 我心算了一下A、B、C都是对的
(x-1)(x-3)+1
=x²-x-3x+3+1
=x²-4x+4
=(x-2)²
所以选D
相信我没错的,我数学平均成绩在110分以上!!请采纳~
D 解析:6(x-y)-3y(y-x)=6(x-y)+3y(x-y)=3(x-y)(2+y) 故选D D 解析:(x-1)(x-3)+1=x²-4x+3+1=x²-4x+4=(x+2)² 故选D