(x+y)³(2x+2y)²(3x+3y)²的值
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知x,y的值满足方程组x+2y=3,x-y=-2,求x/(x-y)²+x²-y²/(x+
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知x+3y=2,求代数式(x²-y²/x+y)-【2(x+y)】的值
已知x+3y=0,求x³+3x²y-2x-6y的值.
|x+y+2|+(2x+3y+5)²=0 求x y的值.
已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
不解方程组{2x+Y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
不解方程2x+y=5;x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
已知方程组{2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值.
不解方程组{2x+y=5,x-3y=1,求7y(x-3y)²-2(3y-x)³的值