已知,x-y=2,xy=7 求x^2 y-xy^2
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/15 10:23:58
已知,x-y=2,xy=7 求x^2 y-xy^2
已知,x-y=2,xy=7 求x^2 y-xy^2
已知,x-y=2,xy=7 求x^2 y-xy^2
等于14
因为X-Y=2,所以X=Y+2,
所以X^2Y-XY^2=XY(X-Y)=7×(Y+2-Y)=7×2=14
请采纳!谢谢
提取公因式即可~~~
x^2y - xy^2=xy*(x-y)
=7*2
=14
O(∩_∩)O谢谢哦~
望采纳~~~
x^2 y-xy^2=xy(x-y)=14
X^2Y-XY^2=XY(X-Y)=7×(Y+2-Y)=7×2=14
已知X+y=6,xy=7 求x^2y+xy^2=已知X+y=6,xy=7 x^2y+xy^2
已知x=3y,试求(x-y)^2+2xy-y^2/x^2+7xy+y^2
已知x=3y,试求(x-y)^2+2xy-y^2/x^2+7xy+y^2
已知x*x+xy-2y*y=7 求整数x y的值
已知,x-y=2,xy=7 求x^2 y-xy^2
已知xy^2=-2求xy(2x^3y^7+5x^2y
已知x+y=0,xy=-7,求x^2y+xy^2
已知x+y=2,xy=7求x²y+xy²的值
已知整数x和y,满足x^+xy-2y^=7,求xy的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知:x(x-50y)+xy=50y^2,求:(x-y):y=?
已知x-xy=8,xy-y=-9,求x+y-2xy的值
已知X/Y=2/7,求x^2-3XY+2Y^2/X^2-2XY+Y^2
已知x/y=7/2,求2x+3xy+2y/x+2xy+y的值
已知x+y=-5,xy=7,求x^2y+xy^2-x-y的值
已知1/x-1/y=5,求分式y+xy-x/2x+7xy-2y的值.
已知1/x-1/y=5 求分式-x+xy+y/2x+7xy-2y
已知1/X-1/y=5,求分式(y+xy-x)/(2x+7xy-2y)的值