4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是?若x^2(x-3)+3x-9能被x-a整除,则a的值是多少?

来源：学生作业帮助网 编辑：作业帮 时间：2024/05/05 18:26:18
4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是?若x^2(x-3)+3x-9能被x-a整除,则a的值是多少?

4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是?若x^2(x-3)+3x-9能被x-a整除,则a的值是多少?
4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是?
若x^2(x-3)+3x-9能被x-a整除,则a的值是多少?

4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是?若x^2(x-3)+3x-9能被x-a整除,则a的值是多少?
4x^2+4x+y^2-2y+2= (4x^2+4x+1)+(y^2-2y+1)=(2x+1)^2+(y-1)^2=0
2x+1=0,y-1=0,x=-1/2,y=1
x^3y-y^3x=xy(x+y)(x-y)=-1/2*1/2(-3/2)=3/8
x^2(x-3)+3x-9=x^2(x-3)+3(x-3)=(x-3)(x^2+3) a=3

4x^2+4x+y^2-2y+2=0,则x^3y-y^3x得值是？
(4x^2+4x+1)+(y^2-2y+1)=0
(2x+1)^2+(y-1)^2=0
2x+1=0
y-1=0
x=-1/2,y=1
x^3y-y^3x=xy(x^2-y^2)=-1/2(1/4-1)=3/8
若x^2(x-3)+3x-9能被x-a整除，则a的值是多少？
x^3-3x^2+3x-9=x^2(x-3)+3(x-3)=(x^2+3)(x-3)
所以可知a=-3

已知x*x+4x+y*y-2y+5=0,则x*x+y*y=? x*x+2x+y*y-4y+5=0 x= y= 已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 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*y)的值 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= (x-4y)(2x+y)= x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 x^2+y^2-2x+4y-20=0则y/x的最大值,x+y的最大值 设实数x,y 满足x²+4y²+2x-4y+2+0 则x+y= 如果有理数x.y满足x^2+y^2+4x-6y+13=0,则y^x=? 已知3x-4y=0,则x^2-y^2/x^2+y^2 已知x^2+y^2-4x+2y+5=0则x^y=? 已知x^2+4x+y^2+2y+5=0,则x^y= .|x-2y-3|+|2x-y+4|=0则x=y= x^2+y^2+16x-4y+68=0,则x+y=? 已知X^2+Y^2+16X-4Y+68=0,则X+Y=----------- x+5y+2=0,则4^2x+y*8^y-x x平方-4x+2y+6y+13=0则x= y=?