x+y=0.2,x+3y=1,求3x²+12xy+12y²的值
x+y=0.2,x+3y=1,求3x²+12xy+12y²的值
x+y=0.2 x+3y=1 求3x²+12xy+12y²的值
4/X+1/Y=2,XY=-1,求代数式4Y-X/X-2Y/(x+2y-12Y²/x-2y)的值
x/y=3,求x²+y²-xy/x²-y²的值.
1/x+1/y=5,求2x-3xy+2y/x²+xy+y的值
已知x+y=0.2 x+3y=1 求3x²+12xy+12y²
已知X+Y=-1,XY=-12,求下列各式的值:1 X^2+y^2; 2 X^2+Y^2--XY:3 (X-Y)^2
求x²+y²-2x+4y+1的最小值 求x,y的值 x²+2xy+4x-12y+22=0
已知x+y=0.2,x+3y=1,求3x²+12xy+12y²的值
已知x+y=4.x-y=6.求代数式xy(y²+y)-y²(xy+2x)-3xy的值
已知x/y=3,求x²+2xy-3y²/x²-xy+y²的值
已知y/X=3,求x²-xy+y²/x²+2xy-3y²的值