(x+5y)(x+4y)-(x-y)(x+y),其中,x=-二又三分之二,y=七分之三

{(x,y) |x|+|y| x>y?x:y 4x+2y-5x-y 5x-4y(y-x)=? x-y+5x-4y 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) (x+y)(x-y)+4(y-1) x(x-y)+4(y-x)因式分解 x-y+5y-4y （y-x)+x(x-y)^3-(y-x)^4 因式分解 y=|-x.x+4x+5| x^/y-x-y^/y-x化简. 化简x(y-x)-y(x-y) 行列式计算 x y x+y y x+y x x+y x y|x y x+y ||y x+y x ||x+y x y | y/(x+y)-x/(x-y) （5x-3y)(3y+5x)-(4y-3x)(3x-4y) (3x-4y)(5x-4y)-(7x-8y)(6y-5x) （5x+3y)(3y-5x)-(4x-y)(4y+x)=