x的平方加y的平方 4x一6y 13=0
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(4x的平方加y的平方)的平方减16x的平方y的平方=(4x^2+y^2)^2-16x^2y^2=16x^4-8x^2y^2+y^4=(4x^2-y^2)^2=(2x+y)^2*(2x-y)^2
把25拆成16+9(x²-8x+16)+(y²+6y+9)=0(x-4)²+(y+3)²=0平方大于等于0,相加等于0若有一个大于0,则另一个小于0,不成立.所
=9x^2+6x+1-(4y^2+4y+1)=(3x+1)^2-(2y+1)^2
x²+y²+4x-6y+13=0(x²+4x+4)+(y²-6y+9)=0(x+2)²+(y-3)²=0x+2=0y-3=0x=-2y=3当
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
(4x²+20x+25)+(y²+6y+9)=0(2x+5)²+(y+3)²=0所以2x+5=0,y+3=0x=-5/2,y=-3所以x+y=-11/2
前者分子:x^2-y^2=(x+y)(x-y)那前面这项就可以化简约分啦后者分子:4x^2-4xy+y^2=(2x)^2-2*2xy+y^2=(2x-y)^2建议你理解一下x^2-2xy+y^=(x-
是要化简吗再答:
设y/x=k,则把y=kx代入原式整理得(k^2+1)x^2-4x+1=0.令△≥0,得k^2≤3.则(y/x)max=k最大值=根号3
把两点坐标代入y=x^2+x+b^2,得方程组a^2+a+b^2=-1/4a^2-a+b^2=m(a+1/2)^2=-b^2=>b=0,a=-1/2m=a^2-a+b^2=1/4+1/2+0=3/4m
x^2-4xy+4y^2-3x+6y+2=(x-2y)^2-3(x-2y)+2=(x-2y-1)(x-2y-2)
x^2+4x+y^2-2y+5=0(x^2+4x+4)+(y^2-2y+1)=0(x+2)^2+(y-1)^2=0x=-2,y=1x^2+y^2=(-2)^2+1^2=4+1=5
[(x²+y²-9)²-4x²y²]/(x²+6x+9-y²)=(x²+2xy+y²-9)(x²-2
4x平方加y平方-4x+6y+10=(2x-1)^2+(y+3)^2=02x-1=0y+3=0x=1/2y=-3x^2+y^2=1/4+9=37/4
X的平方-4X+4+Y的平方+6+9=0(X-2)的平方+(Y+3)的平方=0X=2Y=-3
(x^2+y^2)^2-4x^2y^2=(x^2+y^2+2xy)(x^2+y^2-2xy)=(x+y)^2*(x-y)^2=(x^2-y^2)^2数学佰亊嗵为你解答,希望我的回答为您带来帮助!