2x/x²-64y² - 1/x-8y

2X/x²-64y² 减去1/X-8y得多少,.解析. x²－64y²分之2x 减 x－8y分之1 计算：[(x＋¼y)＋(x-¼y)](2x²-1/8y²) 1、x(x-y)(x+y)-x(x+y)^2 (3)(4x-2y)-[5x-(8y-2x-y)]+x (4)-(2x²-3x-1)-2(x²-3x (2x-y)²-4(x-y)(x+2y) 化简：（2x-y)²-4(x-y)(x+y) 已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y 1、y-x/x²-y² 【(1)/(x-y)+(1)/(x-y)】÷(2x)/(x²-2xy+y²) 计算3x[xy-2x(1/y-x/3]+3y(x²-y²) [(y-2x)(-2x-y)-4(x-2y)²]*2y,其中x=1,y=2