求圆x方+y加10x+10y方公共弦长-搜答案-神马作文网

x^2+2x+y^2-6y+10=0可以化解为（x+1)^2+(y-3)^2=0,等价于x+1=0且y-3=0,所以有x=-1,y=3,故x^3*y=-3.

x=4.6415888336127788924100763509194y=10-x=10-4.6415888336127788924100763509194=5.3584111663872211075

(x²+y²+1)(x²+y²+3)=8(x²+y²)²+3(x²+y²)+(x²+y²)

(x-2)²+(y-3)²=1x=2+cosay=3+sinax²+y²=6sina+4cosa+14=√(6²+4²)sin(a+b)+1

已知x方加y方减2x加4y等于-5x方+y方-2x+4y+5=0x方-2x+1+y方+4y+4=0(x-1)方+(y+2)方=0所以x-1=0,y+2=0所以x=1,y=-2如果不懂,请追问,祝学习愉

x+y=7x^2+y^2=55(x+y)^2=x^2+y^2+2xy=492xy=49-55=-6,xy=-3（x^3）·（y^3）=(xy）^3=(-3)^3=-27

见图

∵3x+4y-10=0∴y=(10-3x)/4∴x²+y²=x²+(100-60x+9x²)/16=(25x²-60x+100)/16=[25(x-6

先分解因式,后乘法.(X^4-Y^4)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X+Y)(X^2+Y^2)/(X^3+X^2Y+XY^2+Y^3)=(X-Y)(X^3+X^2Y+XY^2+

X二次方+2X+Y二次方-6y+10=0x^2+2x+1+y^2-6y+9=0(x+1)^2+(y-3)^2=0(x+1)^2=0(y-3)=0x+1=0y=3x=-1所以2x-y=2*(-1)-3=

（X+Y+Z)²=X²+Y²+Z²+2(XY+YZ+XZ)X²+Y²+Z²=10²-2×8=84

∫∫D|1-x²-y²|dxdy=∫∫D¹(1-x²-y²)dxdy+∫∫D²(x²+y²-1)dxdyD¹:

X^2+y^2=4求式=x^2-2√3-y^2=x^2-2√3-4+x^2=2x^2-2√3-4而x^2≤4则X^2=4时,原式最大为-2√3

(x＋y)/(x)=31＋(y/x)=3得：y/x=2则：(x²＋y²)/(x²－xy＋y²)【分子分母同除以x²】=[1＋(y/x)²]/

原式=x^2-2x+1+y^2+6y+9=0=(x-1)^2+(y+3)^2=0∴x=1,y=-3不懂再问

y-2x=-20102x-y=20102x^4y³-x³y^4=x³y³(2x-y)=(xy)³(2x-y)=10³×2010=201000

x的立方加y的立方等于459,x的四次方加y的四次方等于3621,再问：肯定要再答：其实不难x+y=9xy=10(x+y)平方=x方+y方+2xy则x方+y方=61后边x方写成xx,其他同理，切中英文

令（x+y）^3=1000X^3+Y^3+3X²Y+3Y²X=1000化简：3XY（X+Y）=600,所以：xy=20因为：X+Y=10,xy=20可以得到：X,Y.