如题{(X,Y)|(X+2)2+|Y-3|=0,X,Y属于R}=

(x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 计算[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y如题 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}= 初一数学题求(x+y)(2x-y)-(x+2y)(x-2y)的值,其中x=3,y=4如题 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 如题 如果x-3y/x=1/2,那么x/y= x(x-y)2-(y-x)3 先化简,再求值：[(x-y)^2+(x+y)(x-y)]÷2x ,其中x=3,y=-2如题 因式分解：m^2(x-y)+n^2(y-x)m^2(x-y)+n^2(y-x) .如题. 已知(2x+2y+1)(2x+2y-1)=3 则x+y=___如题 已知(x-y)2-2x+2y+1=0,则(x-y)^3是多少如题,要有过程! 负指数幂的计算:(3x^-1-y)^2-(3x^-1+y)^2如题,-12y/x 2X+2Y=44.X+3Y=26.X=?.Y=?如题... [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x