{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/08/23 14:45:00
{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
/是分数线,第一个式子中分子是4xy,分母是x-y;第二式中分子是4xy,分母是x+y.
/是分数线,第一个式子中分子是4xy,分母是x-y;第二式中分子是4xy,分母是x+y.
原式
={[(x-y)^2+4xy]/(x-y)}{[(x+y)^2-4xy]/x+y}
={[x^2-2xy+y^2+4xy]/(x-y)}{[x^2+2xy+y^2-4xy]/x+y}
={[x^2+2xy+y^2]/(x-y)}{[x^2-2xy+y^2]/x+y}
={[(x+y)^2]/(x-y)}{[(x-y)^2]/x+y}=(x+y)(x-y)
=x^2-y^2
={[(x-y)^2+4xy]/(x-y)}{[(x+y)^2-4xy]/x+y}
={[x^2-2xy+y^2+4xy]/(x-y)}{[x^2+2xy+y^2-4xy]/x+y}
={[x^2+2xy+y^2]/(x-y)}{[x^2-2xy+y^2]/x+y}
={[(x+y)^2]/(x-y)}{[(x-y)^2]/x+y}=(x+y)(x-y)
=x^2-y^2
{x-y+(4xy/x-y)}{x+y-(4xy/x+y)}怎么解?
怎么化简(x-y+4xy/x-y)(x+y-4xy/x+y)(/是分数线)
x^2y+4xy+4y
(x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy)
(x^2-xy)y÷y-x/xy怎么做?
xy-1+x-y
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
求方程组的解,方程组xy/(2x+y)-xy/(2x-y)=3,xy/(2x-y)+xy/(2x+y)=4
x²/xy-x/y
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
2xy/(x+y)(x+y)与x/(x+y)(x-y)怎么通分
(-3x^y+2xy)-( )=4x^+xy