〔(X+Y)(X-Y)^/(X^-2XY+Y^)-(X^+Y^),其中x=-1/6,y=7/4. 求值

来源：百度知道编辑：UC知道时间：2024/05/16 05:23:26

〔(X+Y)(X-Y)^/(X^-2XY+Y^)-(X^+Y^),其中x=-1/6,y=7/4
求值
给点过程么!

437/84

(X+Y)(X-Y)^/(X^-2XY+Y^)-(X^+Y^)
=(X+Y)(X-Y)^2/(X-Y)^2-(X^2+Y^2)
=(X+Y)-(X^2+Y^2)
=-217/144
不过我猜想你的题目是不是打错了，是不是这样
[(X+Y)(X-Y)]^/(X^-2XY+Y^)-(X^+Y^)
如果是则原式
=(X+Y)^2*(X-Y)^2/(X-Y)^2-(X^2+Y^2)
=(X+Y)^2-(X^2+Y^2)
=2XY
=2*(-1/6)*7/4
=-7/12

3(x+y)(x-y)+4(x-y)^2=? 因式分解:(x+y)(x+y)+4(x-y)(x-y)-4(x·x-y·y) (x+y)4(x-y)4 4(x+y)^2+(x+y)+1 2(x-y)-4(-y-x) x*x+y*y+4*x-6*y+13=0 x和y等于多少？把4（x-y+1)+y(y-2x)因式分解编程 x! +(x+y)! +y! 1/4(x+y)+1/2(x+y)*(x+y)>=x*根号y+y*根号x [(x+2y)(x-2y)-(x+4y)∧2]÷(4y)