(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2

(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 计算：(x/x-y)*(y^2/x+y)-(x^4y/x^4-y^4)/x^2/x^2+y^2如题,快,十分钟发 计算[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y如题 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 化简y(x+y)+(x+y)(x-y)-x^2 如题{(X,Y)|(X+2)2+|Y-3|=0,X,Y属于R}= 如题{(X,Y)|(X+2)²+|Y-3|=0,X,Y属于R}= 因式分解：m^2(x-y)+n^2(y-x)m^2(x-y)+n^2(y-x) .如题. 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 {(x,y) |x|+|y| x>y?x:y [(x-y)^2-(x+2y)(x-2y)]/y 计算:y-x分之x+y+x-y分之y-y-x分之2x-y limx^2*y/x^2+y^2 (x,y)趋近(0,0)如题 上面是X^乘以y 初一数学题求(x+y)(2x-y)-(x+2y)(x-2y)的值,其中x=3,y=4如题 4x^4y^2-5x^2y^2-9y^2 因式分解如题 x^2(x-y)+(y-x)