1.圆x^2+y^2-4x-4y-10=0上的点到x+y-14=0的最大距离与最小距离的差是____________2.若直线y=x+m与曲线x=√(1-y^2)恰有一个公共点,则m的取值范围是___________ 

(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x-4y)(2x+y)= (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 解两道二元一次方程组.1.y=2x 10x+y=(10y+x)-362.x+y=5 50x*4=300y 3x+x+4y+(90+10)x=3y-(2x+y)+510y=34x 4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=? 1.(x-2y)(x+2y)-(x平方+y)(x平方-y) 2.(2x-y)(y+2x)-(2y+x)(2y-x)3.已知：x+y=6,x平方-y平方=48,求x,y的值4.x平方-2x分之x+2 -- x平方-4x+4分之x-1 {4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 [(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y (x+y)^2(x-y)^2(x^4+x^2y^2+y^4)=? y'=（y/x）^2+y/x+4微分方程 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 （x+y）/2- x-y/2=6 3(x+y)=4(x-y) x+y/3+x-y/2=6 4(x+y)-2(x-y)=40 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解 5x^3y(x-y)^3-10x^4y^3(y-x)^2 5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解