8(x+y)^3(__)=12(x+y)^5
方程组{2x+3y=5,3x-y=2的解为__
(2X+__)(__-3y)=4x^2-9y^2
1,已知x=3-t,y=t+5,用含x的代数式表示y,Y =__
1.设函数x^2+4y^2+8x+7=0,x^2+y^2的最大值是__,此时x=__,y=__
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
3x-2y=9 x-3y=2 x+y=5 x+2y=3 y=x 2x+y=8
已知x.x+y.y-6x-8y+25=0,求3x.x+5y的值
一直实数X,Y满足{Y≤2X,Y≤4,X-2Y+3≤0}则X+Y-8的最大值为__
int x=2,y; y=(x++)*5;运行后x=_____ __ y=____ ___.
1、3x·(2x-y²)=__.2、(3p+2)(p-1)=__.3、(x-y)²+__+4=(x-
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=