2007(x+y)^2+2006|0.5y-1|=0 求x与y的值2007(x+y)^2+2006|0.5y-1|=0求x与y的值

x,y互为相反数,则x+2x+3x+.+2006x+2007x+2007y+2006y+.+3y+2y+y等于 2007x+2006y=4011 2006x+2007y=40153x-y=4+y x-3y=2/y-x-1 解方程组 2007^2-2006*2007如何做?和x(x-y)^2-y(x-y)的因式分解 2007(x+y)^2+2006|0.5y-1|=0 求x与y的值2007(x+y)^2+2006|0.5y-1|=0求x与y的值 [(2x+y)(2x+y)-(2x+y)(2x-y)]÷2y-0.5y （x+3y)²-2（x-y)（x+y)+(x+y)²其x=0.5,y=-2 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 运用平方差公式计算⑴ 2006 * 2008 - 2007^2⑵ （x + y）（2x - y）-（x + 2y）（x - 2y) A={（x,y)|y>=0.5|x-2|},B={(x,y)|y 约分：2x-4y/y-0.5 mathematica软件,已知y[x],Y=f1(x),X(x)=f2(x),如何plot Y[X]?y[x_] := x + 9.81/2*x*xk=1X[x] = x - k*y'[x]/(1 + (y'[x])^2)^0.5Y[x] = y[x] + k/(1 + (y'[x])^2)^0.5Plot[{y[x],Y[X],},{x,0,2}] 化简y(x+y)+(x+y)(x-y)-x^2 2007X-2008Y=2006（1）2006X-2007Y=2005 (2) (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 【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 (2/5y-0.5x)(0.5y+2/5y) x-y=2 那么-2x-2y=多少[（2x=y)的平方-（2x+y)(2x-y)-y(5x+y)]/(0.5y),其中x-y=2