化简3x^2-9x-12/x^2+2x+1 xy-x-y+1/y^2-2y+1

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/04/28 02:12:37

化简3x^2-9x-12/x^2+2x+1 xy-x-y+1/y^2-2y+1
化简约分(1)3x^2-9x-12/x^2+2x+1 (2)xy-x-y+1/y^2-2y+1

3x^2-9x-12/x^2+2x+1
=3(x^2-3x-4)/(x+1)^2
=3(x-4)(x+1)/(x+1)^2
=3(x-4)/(x+1)
xy-x-y+1/y^2-2y+1
=xy-y-x+1/(y-1)^2
=y(x-1)-(x-1)/(y-1)^2
=(x-1)(y-1)/(y-1)^2
=(x-1)/(y-1)

1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) 1、x(x-y)(x+y)-x(x+y)^2 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) (x+y-2xy)(x+y-2)+(1-xy)² 计算3x[xy-2x(1/y-x/3]+3y(x²-y²) 9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy- 化简 (x+y)(x²-xy+y²) ； 3（2x-1）(x+6)-5(x-3)(x+6) (1)(x^2/x)-y-x-y x+y=1,xy=-1/2,求x(x+y)(x-y)-x(x+y)2 计算3xy[2xy-x(y-2)+x-1] 【(1)/(x-y)+(1)/(x-y)】÷(2x)/(x²-2xy+y²)