(x-1)^2y^2=16(x-1)²+y²=16图像中心点横纵坐标图像中心点横纵坐标和面积连着写圆

已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值已知x^2-8x+y^2-y+16又1/4=0,求[(x+y)(x-y)-(x+y)^2-2y(x-3y)]÷4y的值已知

若x-y=1化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)若x-y=1化简（x+y)(x^2+y^2)(x^4+y^4)(x^8+y^8)(x^16+y^16)若x-y=1化简（x+y)(x^2+

X+X+X+Y+Y=20X+Y+Y=14.6x=?Y=?速度啊1分钟时间X+X+X+Y+Y=20X+Y+Y=14.6x=?Y=?速度啊1分钟时间20错了是25啊X+X+X+Y+Y=20X+Y+Y=14.6x=?Y=?速度啊1分钟时间X+X+

若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]

2y(x+二分之一y)-[(x+y)(x-y)+2y(y+x)],其中|x-1|=22y(x+二分之一y)-[(x+y)(x-y)+2y(y+x)],其中|x-1|=22y(x+二分之一y)-[(x+y)(x-y)+2y(y+x)],其中|

（x-y)(x+y)-(x+y)^2+2y(y-x),其中x=1,y=3.（x-y)(x+y)-(x+y)^2+2y(y-x),其中x=1,y=3.（x-y)(x+y)-(x+y)^2+2y(y-x),其中x=1,y=3.（x-y)(x+y

多项式因式分解,(1)y(x-y)+x(x-y)(2)y(x-y)+x(y-x)(3)a(x-y)^2-b(y-x)^2(4)a(x-y)^3-b(y-x)^3(5)a^2b(a-b)-ab^2(a-b)多项式因式分解,(1)y(x-y)+

4x+2y=16x-y=1,4x+2y=16x-y=1,4x+2y=16x-y=1,二式乘以2,相加的,6x=118,得x=3,y=2x=3y=2,xy=6x=1+y4(1+y)+2y=164+4y+2y=166y=12y=2x=3有方程组

（x*x-2xy）*9x*x-(9xy*y*y-12x*x*x*x*y*y)/3xy,其中x=1,y=-1化简帮个忙,（x*x-2xy）*9x*x-(9xy*y*y-12x*x*x*x*y*y)/3xy,其中x=1,y=-1化简帮个忙,（x

x+2y=2x+y+1=7x-y求：2x-y?x+2y=2x+y+1=7x-y求：2x-y?x+2y=2x+y+1=7x-y求：2x-y?x+2y=7x-y-->6x=3y-->y=2x(1)x+2y=2x+y+1-->y-x=1(2)(2

已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值已知x+

设x,y满足约束条件x+y>=1,x-y>=-1,2x-y设x,y满足约束条件x+y>=1,x-y>=-1,2x-y设x,y满足约束条件x+y>=1,x-y>=-1,2x-y画出x+y>=1,x-y>=-1,2x-y=7*(a^3b^4)^

设x,y满足约束条件x+y>=1,x-y>=-1,2x-y设x,y满足约束条件x+y>=1,x-y>=-1,2x-y设x,y满足约束条件x+y>=1,x-y>=-1,2x-y首先救出每两条直线交点,共3个交点,.然后把交点的坐标代入目标函数

1;x/(x-y)平方乘x平方-y平方/x+y+2x+2/x-y-2,其中x,y满足方程组x+2y=3,x-y=-22:已知a大于0,b大于0,2a平方-3ab+b平方=0,求(根号a-根号b)除以(根号a-b根号)1;x/(x-y)平方乘

二元一次方程：2(x+y)-(x-y)=3(x+y)-2(x-y)=1二元一次方程：2(x+y)-(x-y)=3(x+y)-2(x-y)=1二元一次方程：2(x+y)-(x-y)=3(x+y)-2(x-y)=12(x+y)-(x-y)=32

(3x-y)^2+(3x+y)(3x-y),x=1,y=-2(3x-y)^2+(3x+y)(3x-y),x=1,y=-2(3x-y)^2+(3x+y)(3x-y),x=1,y=-21041012290364原式=9x²-6xy+y

y=(2x)/x-1化简成用y表示xy=(2x)/x-1化简成用y表示xy=(2x)/x-1化简成用y表示xy=2x/(x-1)y(x-1)=2xxy-y=2xxy-2x=yx(y-2)=yx=y/(y-2)

2(x+y)-3(x-y)=16(x+y)+(x-y)=512(x+y)-3(x-y)=16(x+y)+(x-y)=512(x+y)-3(x-y)=16(x+y)+(x-y)=512(x+y)-3(x-y)=12x+2y-3x+3y=1-x

{3(x+y)-4(x-y)=4{x+y/2+x-y/6=1{3(x+y)-4(x-y)=4{x+y/2+x-y/6=1{3(x+y)-4(x-y)=4{x+y/2+x-y/6=13(x+y)-4(x-y)=4(x+y)/2+(x-y)/6

{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=-1{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=-1{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=-1令X-y=aX+y=b原方程组变为：