y=x^3-5x^2+2x-8 求y撇

y=x^3-5x^2+2x-8 求y^2求y撇 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) {(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=? y=x^3-5x^2+2x-8 求y撇 6x-2y=5 8x-3y=-5 求x,y x+y=8 2x-y=1 求3x+5y 3X+2Y=5X+2 2(3X+2Y)=2X+8 求 X Y 已知x-2y=2016,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x的值 已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]/(8x)) x-2y=2008求{(3x+2y)(3x-2y)-(x+2y)(5x-2y)}/8x 已知x-2y=2010,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值 已知:x-2y=2009,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以8x 的值 5X+Y=3 X+5Y=2 求x和y.5X+Y=3X+5Y=2求x和y. 已知x-y=3,求[（x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值 已知3x =2y 求x/x+y+y/x-y-y²/x²-y² 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 求(X+Y)(X-Y)(X²+Y²),X=5 Y=2,