拋物線x+y^2-9=0與直線x-y-3=0所圍成的區域面積

3(x+y)-2(x-y)=114(x+y)+3(x-y)=93(x+y)-2(x-y)=114(x+y)+3(x-y)=93(x+y)-2(x-y)=114(x+y)+3(x-y)=93(x+y)-

4(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=11打错了吧,这样

若／X+Y-9／+（2X-Y+3)=0求X与Y的值若／X+Y-9／+（2X-Y+3)=0求X与Y的值若／X+Y-9／+（2X-Y+3)=0求X与Y的值前边是绝对值么?是的话,有x+y=9,2x-y=-

（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y这是什么

已知:3x-5y=0,求x/y,x-y/y,x-y/x已知:3x-5y=0,求x/y,x-y/y,x-y/x已知:3x-5y=0,求x/y,x-y/y,x-y/x3x-5y=03x=5y→x/y=5/

常微分方程的通解dy/dx=(x-y+1)/(x+y-3)y^4=2y^n+y=0y''''+6y''+9y=e^(-3x)y''''+y''-2y=4e^(2x)常微分方程的通解dy/dx=(x-y+1)/(x

已知x,y满足{3x-y=9{x-3y=0求x+2y+4y的平方/x-2y-4x的平方y/x的平方-4y的平方已知x,y满足{3x-y=9{x-3y=0求x+2y+4y的平方/x-2y-4x的平方y/

x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²

7y(x-3y)-2(3y-x)=0.x=?,y=?7y(x-3y)-2(3y-x)=0.x=?,y=?7y(x-3y)-2(3y-x)=0.x=?,y=?7y(x-3y)-2(3y-x)=07y(x

y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无y-3x=2,y-5x=4,y-7x=6,y-9x=8,y-11x=0方程组,无y-3x=2,y-5x=4,y-7x=6

x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值x²-2x+y²+6y+10=0,求—9(x+y)²+

已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..已知

(x-y)(x-2y)+(x+2y)(x-3y)-2(x-3y)(x-4y)=(x-y)(x-2y)+(x+2y)(x-3y)-2(x-3y)(x-4y)=(x-y)(x-2y)+(x+2y)(x-3

(x+y)(x-y)+(x-y)平方-(x-y)(3x-y)其中x=-2y=3分之一(x+y)(x-y)+(x-y)平方-(x-y)(3x-y)其中x=-2y=3分之一(x+y)(x-y)+(x-y)

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

已知x,y为实数,根号3x+4+y^2-6Y+9=0则x+y=?已知x,y为实数,根号3x+4+y^2-6Y+9=0则x+y=?已知x,y为实数,根号3x+4+y^2-6Y+9=0则x+y=?是不是(

已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}/x^2-9y^2的值已知3x^2+xy-2y^2=0,求{(x+y)/(x-y

先化简,再求值[2/3x-2/x+y（x+y/3x-x-y）]*x/x-y,其中5x+3y=0先化简,再求值[2/3x-2/x+y（x+y/3x-x-y）]*x/x-y,其中5x+3y=0先化简,再求

先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0先化简,再求值:[3x-2/x+y(x+y/3x-x-y)]/(x-y/x),其中5x+3y=0先化简,

(x+y)(2x-3y)=?(x+y)(2x-3y)=?(x+y)(2x-3y)=?（x+y）（2x-3y）=2x-3xy+2xy-3y=2x-xy-3y