已知x+y+z=3,x²+y²+z²=29,x³+y³+z³
已知x+y+z=3,x²+y²+z²=19,x³+y³+z³
已知:x+y+z=1,x²+y²+z²=2,x³+y³+z³
已知x,y,z为正整数,且满足x³-y³-z³=3xyz,x²=2(y+z),求
2003x³=2004y³=2005z³,xyz>0,且³√2003x²
7-2xy-3x²y³+5x³y²z-9x⁴y³z&sup
已知(x²-1)²+|2y³-686|+根号z+4=0 求z(x+y)的值
x³y³-x²y²-xy+1
数学整式除法计算:(1)(7x²y³-8x²y³z)÷8x²y&sup
(x+y)²-(x³+y³)÷(x+y)
已知x/y=3,求x²+2xy-3y²/x²-xy+y³的值
数学题 计算已知x²-4X+Y²-10Y+29=0 求 x³Y²+4x³
1已知X-Y=XY=3求(X+Y)²及X³-Y³的值