作业帮因式分解x(x y)(x-y
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/16 18:38:28
(x+1)(y+1)
x²+xy-6y²=（x+3y)(x-2y)x^3-3x^2+4=x^3-2x^2-x^2+4=x^2(x-2)-(x+2)(X-2)=(x-2)(x^2-x-2)=(x-2)(x
8（x平方-2y平方)-x(7x+y)+xy=8x平方-16y平方-7x平方-xy+xy=x平方-4y平方=(x-2y)(x+2y)手机提问的朋友在客户端右上角评价点【满意】即可.再问：太棒了！连我这
=3（x+y)2
这题用十字相乘法：原式=(x+3y)(x-2y)因式分解一般用公式法(平方差公式,完全平方公式,立方和差公式等),十字相乘法,提取公因式法,或则用求根公式
x²＋y－xy－x＝﹙x²－xy﹚＋﹙y－x﹚＝x﹙x－y﹚－﹙x－y﹚＝﹙x－y﹚﹙x－1﹚
题目不清楚啊,那个是几次方啊?算了,我就按2次方做了啊2x^2+xy-6y^2=(2x-3y)(x+2y)6（x+y)^2-5(x+y)-1=[6(x+y)+1][(x+y)-1]=(6x+6y+1)
题目是不是x^2y-7xy+6yx^2y-7xy+6y=y(x^2-7x+6)=y(x-1)(x-6)
=xy(x^2-y^2)=xy(x+y)(x-y)
xy+2x+y+2=y(x+1)+2(x+1)=(x+1)(y+2)
1-x-y+xy=(1-x)-(y-xy)=(1-x)-y(1-x)=(1-x)(1-y)
x^2y+xy^2=xy(x+y)
x^3+y^3=(x+y)(x^2-xy+y^2)x^3-y^3=(x-y)(x^2+xy+y^2)
xy-x-y+1=x(y-1)-y+1=x(y-1)-(y-1)=(y-1)(x-1)
x²y(x-y)-xy²(x-y)=xy(x-y)(x-y)=xy(x-y)²如果不懂,祝学习愉快!
因式分解x²(x+1)-y(xy+x)原式=x³+x²-xy²-xy=x³-xy²+x²-xy=x(x²-y²
(x+y)(x-y)-x(y+1)-y(y+1)=(x+y)(x-y)-(x+y)(y+1)=(x+y)(x-2y-1)
再答：采纳我好吗？谢谢
xy+y平方+x-y-2=xy+x+y^2-y-2=x(y+1)+(y+1)(y-2)=(y+1)(x+y-2)
(x-1)(y-1)