1/xy-y∧2,x+y/x∧2-y∧2通分,

1/xy-y∧2,x+y/x∧2-y∧2通分, .(x+y-2)(x+y-2xy)+(xy-1)^2 (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) (-1/3xy)∧2*[3xy(2x-y)-3x(2xy-4y∧2)] 设x,y∈R,比较x∧2+y∧2+1与x+y+xy的大小? 已知x+y=6,xy=-3,则x∧y+xy∧2= (-x-y)(x^2+xy+y^2) 化简x^-y^/x^-2xy+y^ 2*(x-y)²(y-x)(xy) 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) {(x-y/x^2-2xy+y^2)-(xy+y^2/x^2-y^2)}*(xy/y-1) 因式分解2x∧2-5xy+2y∧2+3x-3y+1 根号x+y-1+(xy+2)∧2=0,则X,Y的取值 X-Y/2X+2Y XY/X+Y² (x/x+y-x/y-x-2xy/x.x-y.y)/(1/x-1/y) 分式化简 因式分解：x×x-xy-2y×y-x-y 因式分解 1-x∧2+2xy-y∧2 xy-x-y+1/y²-2y+1