求圆(x-5)^2 y^2=16

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求圆(x-5)^2 y^2=16
x*x+4y*y+2x*x-4y+2=0求根号下5x*x+16y*y的值快啊

x*x+4y*y+2x*x-4y+2=0应该是x*x+4y*y+2x-4y+2=0可变换为(x+1)^2+(2y-1)^2=0x=-1,y=1/2,剩下的自己做一下,关键是上面一步要会

求5x-2y=x-y=4x-3y-2的解

5x-2y=x-y=4x-3y-2则4x=y代入:x-4x=4x-12x-2得到x=-2/5y=-8/5

|3x-y+5|+(2x-y+3)²=0 求x=?y=?

由题意可得如下方程组:3x-y+5=02x-y+3=0解得:x=-2y=-5/2再问:很可惜思路对了得数错了Y=-1你是第一个回答我的还是选你吧

(3x+2y)+(5x-y)i=17-2i.求x与y

根据方程式可以得出方程组:3x+2y=175x-y=-2解此方程得:x=1y=7解方程不用我说了吧,2式乘2再加上1式可以解出x

如果x,y表示有理数,且x、y满足条件,|x|=5,|y|=2.|x-y|=y-x,求:x+2y的值.

有题可知,y≥X,所以y=±2,X=-5,y=2,X=-5,x+2y=-1;y=-2,X=-5,x+2y=-9a=3的55次方=3的5次方再11次方=243的11次方b=4的44次方=4的4次方再11

若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*

(x*x+y*y)(x*x+y*y)-4x*x*y*y=(x^4-2x^2y^2+y^4)=(x^2-y^2)^2=0x^2=y^2x/y=±1(x*x+5xy+y*y)/(x*x+2xy+y*y)=

x-3y=0,求2X+5Y\3X-2Y

x=3y所以原式=11y/7y=11/7

已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值

∵x²+y²-4x+2y+5=0x²-4x+4+y²+2y+1=0(x-2)²+(y+1)²=0x-2=0y+1=0∴x=2y=-14x&#

已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y

X+Y分之X-Y等于3x=-2yX+Y分之2(x-y)减X+Y分之3X+Y=(-x-3y)/(x+y)=1

求y''-2y'+5y=(e^x)sin2x

咋不是特征根了根据你解得的齐次的通解是y=e^x(C1sin2x+C2cos2x)右边含在齐次特解里再问:1.加减号打的时候打错了~2.由特征方程得出的解是含有复数,我知道可以是复数。3.这个我也知道

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)

因为(x-y)/(x+y)=3,则(x+y)/(x-y)=1/3则5(x-y)(x+y)-(x+y)/2(x-y)=5*3-1/(3*2)=15-1/6=89/6

已知x^2+4y^2-4x+4y+5=0,求(y^4-x^4)/(y-2x)(x+y)*2x-y

已知x^2+4y^2-4x+4y+5=0求((y^4-x^4)/(y-2x)(x+y))*((2x-y)/(xy-y^2))/((x^2+y^2)/y)的值答案:x²+4y²-4x

(2x-y)/3 = (x+3y)/5 =2 求x、y

解(2x-y)/3=2(x+3y)/5=2即2x-y=6①x+3y=10②①×3得:6x-3y=18③③+②得:7x=28∴x=4,y=2

若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值

若x-y/x+y=5则x-y=5(x+y)所以求x-y/2x+2y+5x+5y/3x-3y=5(x+y)/[2(x+y)]+5(x+y)/3(x-y)=5/2+5(x+y)/[3*5(x+y)]=5/

已知x²+4x+y-2y+5=0求x+2y

x²+4x+y²-2y+5=0x²+4x+4+y²-2y+1=0(x+2)²+(y-1)²=0所以x+2=0y-1=0则x=-2y=1所以x

求dy/dx=(x-y+5)/(x+y-2)

dy/dx=(x-y+5)/(x+y-2)=[(x+3/2)-(y-7/2)]/[(x+3/2)+(y-7/2)]令v=y-7/2,u=x+3/2,原方程化为dv/du=(u-v)/(u+v)变为齐次

若2x-3y=0,求5x+4y/3x-2y

2x-3y=02x=3yx=1.5y5x+4y/3x-2y=7.5y+4y/4.5y-2y=11.5y/2.5y=4.6

已知x²+y²+5=2x+4y,求【2x²-(x-y)(x-y)】【(x+y-1)(x-y

1,-3再问:过程。。。再答:★(x²-2x)+(y²-4y)=5★(x-1)²+(y-2)²=1+4-5★(x-l)²=0,(y-2)²=

已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(

原式=x-x+x-x+……-x+(2-1+4-3+5-4+……+2008-2007-2009)y=0+(1×1004-2009)y=-1005y=1005/2