(2x-0.5y)(2x+0.5y)-(2x-0.5y)^2 计算

[(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 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 (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 matlab画二元函数图像z = (x/(x+y) + 1.96*1.96/(2*(x+y)) - 1.96 * ((x/(x+y)*(1-x/(x+y))+1.96*1.96/(4*(x+y)))/(x+y))^0.5)/(1+1.96*1.96/(x+y))该怎么画 1/2x=0.5y则y/x()/(). 1/2x=0.5y则y/x()/(). 约分 2x-4y/y-0.5x [(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