6y减x-搜答案-大师作文网

(x-3)^2+(y-4)^2=0x=3y=4Y分X减X分Y=3/4-4/3=-7/12

2再答：再答：记得给奖励喔

x^2-2x+y^2+6y+10=0x^2-2x+1+y^2+6y+9=0(x-1)^2+(y+3)^2=0x-1=0,y+3=0x=1,y=-3(x-y)/(x+y)=4/(-2)=-2

x^2+y^2=6y-4x-13x^2+4x+4+y^2-6y+9=0(x+2)^2+(y-3)^2=0x=-2y=3x^2-y^2=(-2)^2-3^2=4-9=-5

x+y=8x-y=6所以：2x=14,即x=7y=8-7=1x的平方减y的平方减2x减2y=7²-1²-2×7-2×1=32

x^2+y^2-6x-8y+25=0变为：(x^2-6y+9)+(y^2-8y+16)=0(x-3)^2+(y-4)^2=0即：(x-3)^2=0,且(y-4)^2=0所以：x=3,y=4因此：y/x

x=6-yz²=xy-9=-(y-3)²∴z=y-3=0（两个平方都是非负的,且和为零）∴y=3,x=3∴x=y

X²-Y²=12,即(X+Y)(X-Y)=12.又X+Y=6,则X-Y=2.故(X+Y)+(X-Y)=6+2,即2X=8,X=4;所以,Y=6-X=2.

x²-y²=(x+y)(x-y)=6×5=30

后半句意思都没表达清楚求采纳

3x^2(x-y)+6x(y-x)=3x^2(x-y)-6x(x-y)=(x-y)(3x^2-6x)=3x(x-y)(x-2)

(x-y)^2*(y-x)^2*(x-y)^6=(x-y)^2*(x-y)^2*(x-y)^6=(x-y)^10再问：能详细一点吗?我,初一的再答：(x-y)^2=(y-x)^2=(x-y)^2*(x

(x-y)³+9(x-y)-6(x-y)²

原式=(x-y)[(x-y)^2-6(x-y)+9]=(x-y)(x-y-3)^2很高兴为您解答,祝你学习进步!不懂可追问!

x²-y²=(x+y)(x-y)=6因为x+y=3所以(x+y)(x-y)/(x+y)=6/3x-y=2

(x-y)x^6+(y-x)y^6=(x-y)x^6-(x-y)y^6=(x-y)(x^6-y^6)=(x-y)(x³+y³)(x³-y³)=(x-y)(x+y

(x+y)ˆ2-2(x+y)(x-y)+(x-y)ˆ2=（x+y-x+y）^2=(2y)^4=4y^2如果满意请点击右上角评价点【满意】即可~再问：这个我看不懂，能不能写下来啊，谢

原式=(x+y)²+(x+y)-6=(x+y+3)(x+y-2)

1.y:x=2:55y=2xy=2/5xy-x=-62/5x-x=-6x=10y=4x+y=142.2y-3x=-113x-2y=11x=5,y=2x=7,y=5x=9,y=810x+y=52,75,

很累-3x-2y